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authorMiklos Szeredi <mszeredi@redhat.com>2016-06-30 14:10:49 +0300
committerMiklos Szeredi <mszeredi@redhat.com>2016-06-30 14:10:49 +0300
commit5c672ab3f0ee0f78f7acad183f34db0f8781a200 (patch)
tree8504dad9b399cbef1a3e252c7253325d51740eae /include
parent4c2e07c6a29e0129e975727b9f57eede813eea85 (diff)
downloadlinux-5c672ab3f0ee0f78f7acad183f34db0f8781a200.tar.xz
fuse: serialize dirops by default
Negotiate with userspace filesystems whether they support parallel readdir and lookup. Disable parallelism by default for fear of breaking fuse filesystems. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Fixes: 9902af79c01a ("parallel lookups: actual switch to rwsem") Fixes: d9b3dbdcfd62 ("fuse: switch to ->iterate_shared()")
Diffstat (limited to 'include')
-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 5974fae54e12..27e17363263a 100644
--- a/include/uapi/linux/fuse.h
+++ b/include/uapi/linux/fuse.h
@@ -105,6 +105,9 @@
*
* 7.24
* - add FUSE_LSEEK for SEEK_HOLE and SEEK_DATA support
+ *
+ * 7.25
+ * - add FUSE_PARALLEL_DIROPS
*/
#ifndef _LINUX_FUSE_H
@@ -140,7 +143,7 @@
#define FUSE_KERNEL_VERSION 7
/** Minor version number of this interface */
-#define FUSE_KERNEL_MINOR_VERSION 24
+#define FUSE_KERNEL_MINOR_VERSION 25
/** The node ID of the root inode */
#define FUSE_ROOT_ID 1
@@ -234,6 +237,7 @@ struct fuse_file_lock {
* FUSE_ASYNC_DIO: asynchronous direct I/O submission
* FUSE_WRITEBACK_CACHE: use writeback cache for buffered writes
* FUSE_NO_OPEN_SUPPORT: kernel supports zero-message opens
+ * FUSE_PARALLEL_DIROPS: allow parallel lookups and readdir
*/
#define FUSE_ASYNC_READ (1 << 0)
#define FUSE_POSIX_LOCKS (1 << 1)
@@ -253,6 +257,7 @@ struct fuse_file_lock {
#define FUSE_ASYNC_DIO (1 << 15)
#define FUSE_WRITEBACK_CACHE (1 << 16)
#define FUSE_NO_OPEN_SUPPORT (1 << 17)
+#define FUSE_PARALLEL_DIROPS (1 << 18)
/**
* CUSE INIT request/reply flags