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authorMiklos Szeredi <mszeredi@suse.cz>2007-10-18 03:07:03 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-18 14:37:31 -0700
commitb25e82e5673c750116e8b01a4fc7d09be7809f8c (patch)
tree03d23ccbca6e87ba98efeba445ff714455dba0bb /fs/fuse/file.c
parent93a8c3cd9e9834dc5f5c373336f3a0065521152d (diff)
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 <mszeredi@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/fuse/file.c')
-rw-r--r--fs/fuse/file.c33
1 files changed, 20 insertions, 13 deletions
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index c4c59c7d0038..2b589de044e8 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,

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