fuse: add .write_inode

...and flush mtime from this.  This allows us to use the kernel
infrastructure for writing out dirty metadata (mtime at this point, but
ctime in the next patches and also maybe atime).

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>

1 files changed, 11 insertions, 17 deletions

diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 5e361b122526..8c233834591f 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -1597,23 +1597,17 @@ static void fuse_setattr_fill(struct fuse_conn *fc, struct fuse_req *req,
 /*
  * Flush inode->i_mtime to the server
  */
-int fuse_flush_mtime(struct file *file, bool nofail)
+int fuse_flush_mtime(struct inode *inode, struct fuse_file *ff)
 {
-	struct inode *inode = file->f_mapping->host;
-	struct fuse_inode *fi = get_fuse_inode(inode);
 	struct fuse_conn *fc = get_fuse_conn(inode);
-	struct fuse_req *req = NULL;
+	struct fuse_req *req;
 	struct fuse_setattr_in inarg;
 	struct fuse_attr_out outarg;
 	int err;
 
-	if (nofail) {
-		req = fuse_get_req_nofail_nopages(fc, file);
-	} else {
-		req = fuse_get_req_nopages(fc);
-		if (IS_ERR(req))
-			return PTR_ERR(req);
-	}
+	req = fuse_get_req_nopages(fc);
+	if (IS_ERR(req))
+		return PTR_ERR(req);
 
 	memset(&inarg, 0, sizeof(inarg));
 	memset(&outarg, 0, sizeof(outarg));
@@ -1621,15 +1615,15 @@ int fuse_flush_mtime(struct file *file, bool nofail)
 	inarg.valid |= FATTR_MTIME;
 	inarg.mtime = inode->i_mtime.tv_sec;
 	inarg.mtimensec = inode->i_mtime.tv_nsec;
-
+	if (ff) {
+		inarg.valid |= FATTR_FH;
+		inarg.fh = ff->fh;
+	}
 	fuse_setattr_fill(fc, req, inode, &inarg, &outarg);
 	fuse_request_send(fc, req);
 	err = req->out.h.error;
 	fuse_put_request(fc, req);
 
-	if (!err)
-		clear_bit(FUSE_I_MTIME_DIRTY, &fi->state);
-
 	return err;
 }
 
@@ -1715,7 +1709,7 @@ int fuse_do_setattr(struct inode *inode, struct iattr *attr,
 	/* the kernel maintains i_mtime locally */
 	if (trust_local_mtime && (attr->ia_valid & ATTR_MTIME)) {
 		inode->i_mtime = attr->ia_mtime;
-		clear_bit(FUSE_I_MTIME_DIRTY, &fi->state);
+		/* FIXME: clear I_DIRTY_SYNC? */
 	}
 
 	fuse_change_attributes_common(inode, &outarg.attr,
@@ -1953,7 +1947,7 @@ static int fuse_update_time(struct inode *inode, struct timespec *now,
 {
 	if (flags & S_MTIME) {
 		inode->i_mtime = *now;
-		set_bit(FUSE_I_MTIME_DIRTY, &get_fuse_inode(inode)->state);
+		mark_inode_dirty_sync(inode);
 		BUG_ON(!S_ISREG(inode->i_mode));
 	}
 	return 0;