From 4b2157c44e6ad7e692fcffb7450143e83151d36b Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@suse.cz>
Date: Tue, 6 Dec 2011 18:06:18 +0100
Subject: Add mmap() and munmap() methods to low level API

Currently this is only useful for CUSE.  Also update retrieve_reply()
method.
---
 include/fuse_lowlevel.h | 53 +++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 51 insertions(+), 2 deletions(-)

(limited to 'include/fuse_lowlevel.h')

diff --git a/include/fuse_lowlevel.h b/include/fuse_lowlevel.h
index 51aea39..6435937 100644
--- a/include/fuse_lowlevel.h
+++ b/include/fuse_lowlevel.h
@@ -911,13 +911,19 @@ struct fuse_lowlevel_ops {
 	/**
 	 * Callback function for the retrieve request
 	 *
+	 * Introduced in version 2.9
+	 *
+	 * Valid replies:
+	 *	fuse_reply_none
+	 *
+	 * @param req request handle
 	 * @param cookie user data supplied to fuse_lowlevel_notify_retrieve()
 	 * @param ino the inode number supplied to fuse_lowlevel_notify_retrieve()
 	 * @param offset the offset supplied to fuse_lowlevel_notify_retrieve()
 	 * @param bufv the buffer containing the returned data
 	 */
-	void (*retrieve_reply) (void *cookie, fuse_ino_t ino, off_t offset,
-				struct fuse_bufvec *bufv);
+	void (*retrieve_reply) (fuse_req_t req, void *cookie, fuse_ino_t ino,
+				off_t offset, struct fuse_bufvec *bufv);
 
 	/**
 	 * Forget about multiple inodes
@@ -951,6 +957,37 @@ struct fuse_lowlevel_ops {
 	 */
 	void (*flock) (fuse_req_t req, fuse_ino_t ino,
 		       struct fuse_file_info *fi, int op);
+
+	/**
+	 * Direct mmap (CUSE only for now)
+	 *
+	 * @param req request handle
+	 * @param ino the inode number
+	 * @param addr starting address (in clients address space)
+	 * @param length length of the mapping
+	 * @param prot desired memory protection of the mapping
+	 * @param flags mmap flags
+	 * @param fi file information
+	 *
+	 * Introduced in version 2.9
+	 */
+	void (*mmap) (fuse_req_t req, fuse_ino_t ino, uint64_t addr,
+		      size_t length, int prot, int flags, off_t offset,
+		      struct fuse_file_info *fi);
+
+	/**
+	 * Direct munmap (CUSE only for now)
+	 *
+	 * @param req request handle
+	 * @param ino the inode number
+	 * @param map_id identifies the mapping
+	 * @param length length of the mapping
+	 * @param fi file information
+	 *
+	 * Introduced in version 2.9
+	 */
+	void (*munmap) (fuse_req_t req, fuse_ino_t ino, uint64_t map_id,
+			size_t length, struct fuse_file_info *fi);
 };
 
 /**
@@ -1234,6 +1271,18 @@ int fuse_reply_ioctl_iov(fuse_req_t req, int result, const struct iovec *iov,
  */
 int fuse_reply_poll(fuse_req_t req, unsigned revents);
 
+/**
+ * Reply to an mmap request
+ *
+ * Possible requests:
+ *   mmap
+ *
+ * @param req request handle
+ * @param map_id identifies the mapping
+ * @param length length of the mapping (from zero offset)
+ */
+int fuse_reply_mmap(fuse_req_t req, uint64_t map_id, size_t length);
+
 /* ----------------------------------------------------------- *
  * Notification						       *
  * ----------------------------------------------------------- */
-- 
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