From: Miklos Szeredi <szmi@users.noreply.github.com>
Date: Tue, 22 Jan 2019 20:03:00 +0000 (+0100)
Subject: passthrough_ll: lo_create() should honor CACHE_NEVER (#345)
X-Git-Tag: fuse-3.4.2~12
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=63d53ecc3addb6fcf3d7f38f2de6822ba37bfd2d;p=qemu-gpiodev%2Flibfuse.git

passthrough_ll: lo_create() should honor CACHE_NEVER (#345)

lo_create() did not honour CACHE_NEVER in lo_create(), which has an effect
on how I/O is performed after the open.

The value of CACHE_ALWAYS, which results in setting fi->keep_cache, only
has an effect for the state of the cache at open, and since the file was
just created the cache is always empty.  Hence setting this doesn't have an
effect on lo_create(), but keep it for symmetry with lo_open().
---

diff --git a/example/passthrough_ll.c b/example/passthrough_ll.c
index abb7ec9..1598958 100644
--- a/example/passthrough_ll.c
+++ b/example/passthrough_ll.c
@@ -773,6 +773,7 @@ static void lo_create(fuse_req_t req, fuse_ino_t parent, const char *name,
 		      mode_t mode, struct fuse_file_info *fi)
 {
 	int fd;
+	struct lo_data *lo = lo_data(req);
 	struct fuse_entry_param e;
 	int err;
 
@@ -786,6 +787,10 @@ static void lo_create(fuse_req_t req, fuse_ino_t parent, const char *name,
 		return (void) fuse_reply_err(req, errno);
 
 	fi->fh = fd;
+	if (lo->cache == CACHE_NEVER)
+		fi->direct_io = 1;
+	else if (lo->cache == CACHE_ALWAYS)
+		fi->keep_cache = 1;
 
 	err = lo_do_lookup(req, parent, name, &e);
 	if (err)