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authorPavel Emelyanov <xemul@openvz.org>2013-10-10 17:12:18 +0400
committerMiklos Szeredi <mszeredi@suse.cz>2014-04-02 15:38:50 +0200
commit4d99ff8f12eb20c6cde292f185cb1c8c334ba0ed (patch)
treea0668c9f45b4065ee935c1f653d32a11ae6ef788 /include/uapi
parentea8cd33390fafc1eca06a26e6a9c7bf1d386526f (diff)
downloadop-kernel-dev-4d99ff8f12eb20c6cde292f185cb1c8c334ba0ed.zip
op-kernel-dev-4d99ff8f12eb20c6cde292f185cb1c8c334ba0ed.tar.gz
fuse: Turn writeback cache on
Introduce a bit kernel and userspace exchange between each-other on the init stage and turn writeback on if the userspace want this and mount option 'allow_wbcache' is present (controlled by fusermount). Also add each writable file into per-inode write list and call the generic_file_aio_write to make use of the Linux page cache engine. Signed-off-by: Maxim Patlasov <MPatlasov@parallels.com> Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Diffstat (limited to 'include/uapi')
-rw-r--r--include/uapi/linux/fuse.h7
1 files changed, 6 insertions, 1 deletions
diff --git a/include/uapi/linux/fuse.h b/include/uapi/linux/fuse.h
index 60bb2f9..cf4750e 100644
--- a/include/uapi/linux/fuse.h
+++ b/include/uapi/linux/fuse.h
@@ -93,6 +93,9 @@
*
* 7.22
* - add FUSE_ASYNC_DIO
+ *
+ * 7.23
+ * - add FUSE_WRITEBACK_CACHE
*/
#ifndef _LINUX_FUSE_H
@@ -128,7 +131,7 @@
#define FUSE_KERNEL_VERSION 7
/** Minor version number of this interface */
-#define FUSE_KERNEL_MINOR_VERSION 22
+#define FUSE_KERNEL_MINOR_VERSION 23
/** The node ID of the root inode */
#define FUSE_ROOT_ID 1
@@ -219,6 +222,7 @@ struct fuse_file_lock {
* FUSE_DO_READDIRPLUS: do READDIRPLUS (READDIR+LOOKUP in one)
* FUSE_READDIRPLUS_AUTO: adaptive readdirplus
* FUSE_ASYNC_DIO: asynchronous direct I/O submission
+ * FUSE_WRITEBACK_CACHE: use writeback cache for buffered writes
*/
#define FUSE_ASYNC_READ (1 << 0)
#define FUSE_POSIX_LOCKS (1 << 1)
@@ -236,6 +240,7 @@ struct fuse_file_lock {
#define FUSE_DO_READDIRPLUS (1 << 13)
#define FUSE_READDIRPLUS_AUTO (1 << 14)
#define FUSE_ASYNC_DIO (1 << 15)
+#define FUSE_WRITEBACK_CACHE (1 << 16)
/**
* CUSE INIT request/reply flags
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