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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 /fs/fuse/inode.c
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 'fs/fuse/inode.c')
-rw-r--r--fs/fuse/inode.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 1061b0d9..9ba1919 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -887,6 +887,8 @@ static void process_init_reply(struct fuse_conn *fc, struct fuse_req *req)
}
if (arg->flags & FUSE_ASYNC_DIO)
fc->async_dio = 1;
+ if (arg->flags & FUSE_WRITEBACK_CACHE)
+ fc->writeback_cache = 1;
} else {
ra_pages = fc->max_read / PAGE_CACHE_SIZE;
fc->no_lock = 1;
@@ -914,7 +916,8 @@ static void fuse_send_init(struct fuse_conn *fc, struct fuse_req *req)
FUSE_EXPORT_SUPPORT | FUSE_BIG_WRITES | FUSE_DONT_MASK |
FUSE_SPLICE_WRITE | FUSE_SPLICE_MOVE | FUSE_SPLICE_READ |
FUSE_FLOCK_LOCKS | FUSE_IOCTL_DIR | FUSE_AUTO_INVAL_DATA |
- FUSE_DO_READDIRPLUS | FUSE_READDIRPLUS_AUTO | FUSE_ASYNC_DIO;
+ FUSE_DO_READDIRPLUS | FUSE_READDIRPLUS_AUTO | FUSE_ASYNC_DIO |
+ FUSE_WRITEBACK_CACHE;
req->in.h.opcode = FUSE_INIT;
req->in.numargs = 1;
req->in.args[0].size = sizeof(*arg);
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