From b25e82e5673c750116e8b01a4fc7d09be7809f8c Mon Sep 17 00:00:00 2001 From: Miklos Szeredi Date: Thu, 18 Oct 2007 03:07:03 -0700 Subject: fuse: add helper for asynchronous writes This patch adds a new helper function fuse_write_fill() which makes it possible to send WRITE requests asynchronously. A new flag for WRITE requests is also added which indicates that this a write from the page cache, and not a "normal" file write. This patch is in preparation for writable mmap support. Signed-off-by: Miklos Szeredi Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/fuse/file.c | 33 ++++++++++++++++++++------------- 1 file changed, 20 insertions(+), 13 deletions(-) (limited to 'fs/fuse/file.c') diff --git a/fs/fuse/file.c b/fs/fuse/file.c index c4c59c7d003..2b589de044e 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -443,30 +443,37 @@ out: return err; } -static size_t fuse_send_write(struct fuse_req *req, struct file *file, - struct inode *inode, loff_t pos, size_t count) +static void fuse_write_fill(struct fuse_req *req, struct fuse_file *ff, + struct inode *inode, loff_t pos, size_t count, + int writepage) { - struct fuse_conn *fc = get_fuse_conn(inode); - struct fuse_file *ff = file->private_data; - struct fuse_write_in inarg; - struct fuse_write_out outarg; + struct fuse_write_in *inarg = &req->misc.write.in; + struct fuse_write_out *outarg = &req->misc.write.out; - memset(&inarg, 0, sizeof(struct fuse_write_in)); - inarg.fh = ff->fh; - inarg.offset = pos; - inarg.size = count; + memset(inarg, 0, sizeof(struct fuse_write_in)); + inarg->fh = ff->fh; + inarg->offset = pos; + inarg->size = count; + inarg->write_flags = writepage ? FUSE_WRITE_CACHE : 0; req->in.h.opcode = FUSE_WRITE; req->in.h.nodeid = get_node_id(inode); req->in.argpages = 1; req->in.numargs = 2; req->in.args[0].size = sizeof(struct fuse_write_in); - req->in.args[0].value = &inarg; + req->in.args[0].value = inarg; req->in.args[1].size = count; req->out.numargs = 1; req->out.args[0].size = sizeof(struct fuse_write_out); - req->out.args[0].value = &outarg; + req->out.args[0].value = outarg; +} + +static size_t fuse_send_write(struct fuse_req *req, struct file *file, + struct inode *inode, loff_t pos, size_t count) +{ + struct fuse_conn *fc = get_fuse_conn(inode); + fuse_write_fill(req, file->private_data, inode, pos, count, 0); request_send(fc, req); - return outarg.size; + return req->misc.write.out.size; } static int fuse_write_begin(struct file *file, struct address_space *mapping, -- cgit v1.2.3