summaryrefslogtreecommitdiff
path: root/include/uapi/linux/fuse.h
diff options
context:
space:
mode:
authorDan Schatzberg <dschatzberg@fb.com>2018-10-11 18:17:00 +0300
committerMiklos Szeredi <mszeredi@redhat.com>2018-10-15 16:43:07 +0300
commit5571f1e65486be025f73fa6aa30fb03725d362a2 (patch)
treef5cf8954baf0697386ea6421011fe34d32be2526 /include/uapi/linux/fuse.h
parent9a2eb24d1a349f53e20f3d4503568551561eed23 (diff)
downloadlinux-5571f1e65486be025f73fa6aa30fb03725d362a2.tar.xz
fuse: enable caching of symlinks
FUSE file reads are cached in the page cache, but symlink reads are not. This patch enables FUSE READLINK operations to be cached which can improve performance of some FUSE workloads. In particular, I'm working on a FUSE filesystem for access to source code and discovered that about a 10% improvement to build times is achieved with this patch (there are a lot of symlinks in the source tree). Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to 'include/uapi/linux/fuse.h')
-rw-r--r--include/uapi/linux/fuse.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/uapi/linux/fuse.h b/include/uapi/linux/fuse.h
index 76f46f159992..b4967d48bfda 100644
--- a/include/uapi/linux/fuse.h
+++ b/include/uapi/linux/fuse.h
@@ -121,6 +121,7 @@
* - add FUSE_COPY_FILE_RANGE
* - add FOPEN_CACHE_DIR
* - add FUSE_MAX_PAGES, add max_pages to init_out
+ * - add FUSE_CACHE_SYMLINKS
*/
#ifndef _LINUX_FUSE_H
@@ -257,6 +258,7 @@ struct fuse_file_lock {
* FUSE_POSIX_ACL: filesystem supports posix acls
* FUSE_ABORT_ERROR: reading the device after abort returns ECONNABORTED
* FUSE_MAX_PAGES: init_out.max_pages contains the max number of req pages
+ * FUSE_CACHE_SYMLINKS: cache READLINK responses
*/
#define FUSE_ASYNC_READ (1 << 0)
#define FUSE_POSIX_LOCKS (1 << 1)
@@ -281,6 +283,7 @@ struct fuse_file_lock {
#define FUSE_POSIX_ACL (1 << 20)
#define FUSE_ABORT_ERROR (1 << 21)
#define FUSE_MAX_PAGES (1 << 22)
+#define FUSE_CACHE_SYMLINKS (1 << 23)
/**
* CUSE INIT request/reply flags