1 files changed, 1201 insertions, 161 deletions

diff --git a/fuse/fuse_lowlevel.c b/fuse/fuse_lowlevel.c
index 2e0ad0fd9..103f83154 100644
--- a/fuse/fuse_lowlevel.c
+++ b/fuse/fuse_lowlevel.c
@@ -6,6 +6,9 @@
   See the file COPYING.LIB
 */
 
+#define _GNU_SOURCE
+
+#include "config.h"
 #include "fuse_i.h"
 #include "fuse_kernel.h"
 #include "fuse_opt.h"
@@ -13,7 +16,6 @@
 #include "fuse_common_compat.h"
 #include "fuse_lowlevel_compat.h"
 
-#define linux
 #include <stdio.h>
 #include <stdlib.h>
 #include <stddef.h>
@@ -21,16 +23,36 @@
 #include <unistd.h>
 #include <limits.h>
 #include <errno.h>
+#include <assert.h>
+
+#ifndef F_LINUX_SPECIFIC_BASE
+#define F_LINUX_SPECIFIC_BASE       1024
+#endif
+#ifndef F_SETPIPE_SZ
+#define F_SETPIPE_SZ	(F_LINUX_SPECIFIC_BASE + 7)
+#endif
+
 
 #define PARAM(inarg) (((char *)(inarg)) + sizeof(*(inarg)))
 #define OFFSET_MAX 0x7fffffffffffffffLL
 
+#define container_of(ptr, type, member) ({				\
+			const typeof( ((type *)0)->member ) *__mptr = (ptr); \
+			(type *)( (char *)__mptr - offsetof(type,member) );})
+
 struct fuse_pollhandle {
 	uint64_t kh;
 	struct fuse_chan *ch;
 	struct fuse_ll *f;
 };
 
+static size_t pagesize;
+
+static __attribute__((constructor)) void fuse_ll_init_pagesize(void)
+{
+	pagesize = getpagesize();
+}
+
 static void convert_stat(const struct stat *stbuf, struct fuse_attr *attr)
 {
 	attr->ino	= stbuf->st_ino;
@@ -116,6 +138,49 @@ void fuse_free_req(fuse_req_t req)
 		destroy_req(req);
 }
 
+static struct fuse_req *fuse_ll_alloc_req(struct fuse_ll *f)
+{
+	struct fuse_req *req;
+
+	req = (struct fuse_req *) calloc(1, sizeof(struct fuse_req));
+	if (req == NULL) {
+		fprintf(stderr, "fuse: failed to allocate request\n");
+	} else {
+		req->f = f;
+		req->ctr = 1;
+		list_init_req(req);
+		fuse_mutex_init(&req->lock);
+	}
+
+	return req;
+}
+
+
+static int fuse_send_msg(struct fuse_ll *f, struct fuse_chan *ch,
+			 struct iovec *iov, int count)
+{
+	struct fuse_out_header *out = iov[0].iov_base;
+
+	out->len = iov_length(iov, count);
+	if (f->debug) {
+		if (out->unique == 0) {
+			fprintf(stderr, "NOTIFY: code=%d length=%u\n",
+				out->error, out->len);
+		} else if (out->error) {
+			fprintf(stderr,
+				"   unique: %llu, error: %i (%s), outsize: %i\n",
+				(unsigned long long) out->unique, out->error,
+				strerror(-out->error), out->len);
+		} else {
+			fprintf(stderr,
+				"   unique: %llu, success, outsize: %i\n",
+				(unsigned long long) out->unique, out->len);
+		}
+	}
+
+	return fuse_chan_send(ch, iov, count);
+}
+
 int fuse_send_reply_iov_nofree(fuse_req_t req, int error, struct iovec *iov,
 			       int count)
 {
@@ -128,24 +193,11 @@ int fuse_send_reply_iov_nofree(fuse_req_t req, int error, struct iovec *iov,
 
 	out.unique = req->unique;
 	out.error = error;
+
 	iov[0].iov_base = &out;
 	iov[0].iov_len = sizeof(struct fuse_out_header);
-	out.len = iov_length(iov, count);
 
-	if (req->f->debug) {
-		if (out.error) {
-			fprintf(stderr,
-				"   unique: %llu, error: %i (%s), outsize: %i\n",
-				(unsigned long long) out.unique, out.error,
-				strerror(-out.error), out.len);
-		} else {
-			fprintf(stderr,
-				"   unique: %llu, success, outsize: %i\n",
-				(unsigned long long) out.unique, out.len);
-		}
-	}
-
-	return fuse_chan_send(req->ch, iov, count);
+	return fuse_send_msg(req->f, req->ch, iov, count);
 }
 
 static int send_reply_iov(fuse_req_t req, int error, struct iovec *iov,
@@ -177,10 +229,8 @@ int fuse_reply_iov(fuse_req_t req, const struct iovec *iov, int count)
 	struct iovec *padded_iov;
 
 	padded_iov = malloc((count + 1) * sizeof(struct iovec));
-	if (padded_iov == NULL) {
-		printf("ENOMEM fuse_reply_iov\n");
-		return fuse_reply_err(req, -ENOMEM);
-	}
+	if (padded_iov == NULL)
+		return fuse_reply_err(req, ENOMEM);
 
 	memcpy(padded_iov + 1, iov, count * sizeof(struct iovec));
 	count++;
@@ -253,7 +303,8 @@ int fuse_reply_err(fuse_req_t req, int err)
 
 void fuse_reply_none(fuse_req_t req)
 {
-	fuse_chan_send(req->ch, NULL, 0);
+	if (req->ch)
+		fuse_chan_send(req->ch, NULL, 0);
 	fuse_free_req(req);
 }
 
@@ -310,10 +361,8 @@ int fuse_reply_entry(fuse_req_t req, const struct fuse_entry_param *e)
 
 	/* before ABI 7.4 e->ino == 0 was invalid, only ENOENT meant
 	   negative entry */
-	if (!e->ino && req->f->conn.proto_minor < 4) {
-		printf("ENOENT fuse_reply_entry\n");
+	if (!e->ino && req->f->conn.proto_minor < 4)
 		return fuse_reply_err(req, ENOENT);
-	}
 
 	memset(&arg, 0, sizeof(arg));
 	fill_entry(&arg, e);
@@ -380,6 +429,355 @@ int fuse_reply_buf(fuse_req_t req, const char *buf, size_t size)
 	return send_reply_ok(req, buf, size);
 }
 
+static int fuse_send_data_iov_fallback(struct fuse_ll *f, struct fuse_chan *ch,
+				       struct iovec *iov, int iov_count,
+				       struct fuse_bufvec *buf,
+				       size_t len)
+{
+	struct fuse_bufvec mem_buf = FUSE_BUFVEC_INIT(len);
+	void *mbuf;
+	int res;
+
+	/* Optimize common case */
+	if (buf->count == 1 && buf->idx == 0 && buf->off == 0 &&
+	    !(buf->buf[0].flags & FUSE_BUF_IS_FD)) {
+		/* FIXME: also avoid memory copy if there are multiple buffers
+		   but none of them contain an fd */
+
+		iov[iov_count].iov_base = buf->buf[0].mem;
+		iov[iov_count].iov_len = len;
+		iov_count++;
+		return fuse_send_msg(f, ch, iov, iov_count);
+	}
+
+	res = posix_memalign(&mbuf, pagesize, len);
+	if (res != 0)
+		return res;
+
+	mem_buf.buf[0].mem = mbuf;
+	res = fuse_buf_copy(&mem_buf, buf, 0);
+	if (res < 0) {
+		free(mbuf);
+		return -res;
+	}
+	len = res;
+
+	iov[iov_count].iov_base = mbuf;
+	iov[iov_count].iov_len = len;
+	iov_count++;
+	res = fuse_send_msg(f, ch, iov, iov_count);
+	free(mbuf);
+
+	return res;
+}
+
+struct fuse_ll_pipe {
+	size_t size;
+	int can_grow;
+	int pipe[2];
+};
+
+static void fuse_ll_pipe_free(struct fuse_ll_pipe *llp)
+{
+	close(llp->pipe[0]);
+	close(llp->pipe[1]);
+	free(llp);
+}
+
+#ifdef HAVE_SPLICE
+static struct fuse_ll_pipe *fuse_ll_get_pipe(struct fuse_ll *f)
+{
+	struct fuse_ll_pipe *llp = pthread_getspecific(f->pipe_key);
+	if (llp == NULL) {
+		int res;
+
+		llp = malloc(sizeof(struct fuse_ll_pipe));
+		if (llp == NULL)
+			return NULL;
+
+		res = pipe(llp->pipe);
+		if (res == -1) {
+			free(llp);
+			return NULL;
+		}
+
+		if (fcntl(llp->pipe[0], F_SETFL, O_NONBLOCK) == -1 ||
+		    fcntl(llp->pipe[1], F_SETFL, O_NONBLOCK) == -1) {
+			close(llp->pipe[0]);
+			close(llp->pipe[1]);
+			free(llp);
+			return NULL;
+		}
+
+		/*
+		 *the default size is 16 pages on linux
+		 */
+		llp->size = pagesize * 16;
+		llp->can_grow = 1;
+
+		pthread_setspecific(f->pipe_key, llp);
+	}
+
+	return llp;
+}
+#endif
+
+static void fuse_ll_clear_pipe(struct fuse_ll *f)
+{
+	struct fuse_ll_pipe *llp = pthread_getspecific(f->pipe_key);
+	if (llp) {
+		pthread_setspecific(f->pipe_key, NULL);
+		fuse_ll_pipe_free(llp);
+	}
+}
+
+#if defined(HAVE_SPLICE) && defined(HAVE_VMSPLICE)
+static int read_back(int fd, char *buf, size_t len)
+{
+	int res;
+
+	res = read(fd, buf, len);
+	if (res == -1) {
+		fprintf(stderr, "fuse: internal error: failed to read back from pipe: %s\n", strerror(errno));
+		return -EIO;
+	}
+	if (res != len) {
+		fprintf(stderr, "fuse: internal error: short read back from pipe: %i from %zi\n", res, len);
+		return -EIO;
+	}
+	return 0;
+}
+
+static int fuse_send_data_iov(struct fuse_ll *f, struct fuse_chan *ch,
+			       struct iovec *iov, int iov_count,
+			       struct fuse_bufvec *buf, unsigned int flags)
+{
+	int res;
+	size_t len = fuse_buf_size(buf);
+	struct fuse_out_header *out = iov[0].iov_base;
+	struct fuse_ll_pipe *llp;
+	int splice_flags;
+	size_t pipesize;
+	size_t total_fd_size;
+	size_t idx;
+	size_t headerlen;
+	struct fuse_bufvec pipe_buf = FUSE_BUFVEC_INIT(len);
+
+	if (f->broken_splice_nonblock)
+		goto fallback;
+
+	if (flags & FUSE_BUF_NO_SPLICE)
+		goto fallback;
+
+	total_fd_size = 0;
+	for (idx = buf->idx; idx < buf->count; idx++) {
+		if (buf->buf[idx].flags & FUSE_BUF_IS_FD) {
+			total_fd_size = buf->buf[idx].size;
+			if (idx == buf->idx)
+				total_fd_size -= buf->off;
+		}
+	}
+	if (total_fd_size < 2 * pagesize)
+		goto fallback;
+
+	if (f->conn.proto_minor < 14 ||
+	    !(f->conn.want & FUSE_CAP_SPLICE_WRITE))
+		goto fallback;
+
+	llp = fuse_ll_get_pipe(f);
+	if (llp == NULL)
+		goto fallback;
+
+
+	headerlen = iov_length(iov, iov_count);
+
+	out->len = headerlen + len;
+
+	/*
+	 * Heuristic for the required pipe size, does not work if the
+	 * source contains less than page size fragments
+	 */
+	pipesize = pagesize * (iov_count + buf->count + 1) + out->len;
+
+	if (llp->size < pipesize) {
+		if (llp->can_grow) {
+			res = fcntl(llp->pipe[0], F_SETPIPE_SZ, pipesize);
+			if (res == -1) {
+				llp->can_grow = 0;
+				goto fallback;
+			}
+			llp->size = res;
+		}
+		if (llp->size < pipesize)
+			goto fallback;
+	}
+
+
+	res = vmsplice(llp->pipe[1], iov, iov_count, SPLICE_F_NONBLOCK);
+	if (res == -1)
+		goto fallback;
+
+	if (res != headerlen) {
+		res = -EIO;
+		fprintf(stderr, "fuse: short vmsplice to pipe: %u/%zu\n", res,
+			headerlen);
+		goto clear_pipe;
+	}
+
+	pipe_buf.buf[0].flags = FUSE_BUF_IS_FD;
+	pipe_buf.buf[0].fd = llp->pipe[1];
+
+	res = fuse_buf_copy(&pipe_buf, buf,
+			    FUSE_BUF_FORCE_SPLICE | FUSE_BUF_SPLICE_NONBLOCK);
+	if (res < 0) {
+		if (res == -EAGAIN || res == -EINVAL) {
+			/*
+			 * Should only get EAGAIN on kernels with
+			 * broken SPLICE_F_NONBLOCK support (<=
+			 * 2.6.35) where this error or a short read is
+			 * returned even if the pipe itself is not
+			 * full
+			 *
+			 * EINVAL might mean that splice can't handle
+			 * this combination of input and output.
+			 */
+			if (res == -EAGAIN)
+				f->broken_splice_nonblock = 1;
+
+			pthread_setspecific(f->pipe_key, NULL);
+			fuse_ll_pipe_free(llp);
+			goto fallback;
+		}
+		res = -res;
+		goto clear_pipe;
+	}
+
+	if (res != 0 && res < len) {
+		struct fuse_bufvec mem_buf = FUSE_BUFVEC_INIT(len);
+		void *mbuf;
+		size_t now_len = res;
+		/*
+		 * For regular files a short count is either
+		 *  1) due to EOF, or
+		 *  2) because of broken SPLICE_F_NONBLOCK (see above)
+		 *
+		 * For other inputs it's possible that we overflowed
+		 * the pipe because of small buffer fragments.
+		 */
+
+		res = posix_memalign(&mbuf, pagesize, len);
+		if (res != 0)
+			goto clear_pipe;
+
+		mem_buf.buf[0].mem = mbuf;
+		mem_buf.off = now_len;
+		res = fuse_buf_copy(&mem_buf, buf, 0);
+		if (res > 0) {
+			char *tmpbuf;
+			size_t extra_len = res;
+			/*
+			 * Trickiest case: got more data.  Need to get
+			 * back the data from the pipe and then fall
+			 * back to regular write.
+			 */
+			tmpbuf = malloc(headerlen);
+			if (tmpbuf == NULL) {
+				free(mbuf);
+				res = ENOMEM;
+				goto clear_pipe;
+			}
+			res = read_back(llp->pipe[0], tmpbuf, headerlen);
+			if (res != 0) {
+				free(mbuf);
+				goto clear_pipe;
+			}
+			free(tmpbuf);
+			res = read_back(llp->pipe[0], mbuf, now_len);
+			if (res != 0) {
+				free(mbuf);
+				goto clear_pipe;
+			}
+			len = now_len + extra_len;
+			iov[iov_count].iov_base = mbuf;
+			iov[iov_count].iov_len = len;
+			iov_count++;
+			res = fuse_send_msg(f, ch, iov, iov_count);
+			free(mbuf);
+			return res;
+		}
+		free(mbuf);
+		res = now_len;
+	}
+	len = res;
+	out->len = headerlen + len;
+
+	if (f->debug) {
+		fprintf(stderr,
+			"   unique: %llu, success, outsize: %i (splice)\n",
+			(unsigned long long) out->unique, out->len);
+	}
+
+	splice_flags = 0;
+	if ((flags & FUSE_BUF_SPLICE_MOVE) &&
+	    (f->conn.want & FUSE_CAP_SPLICE_MOVE))
+		splice_flags |= SPLICE_F_MOVE;
+
+	res = splice(llp->pipe[0], NULL,
+		     fuse_chan_fd(ch), NULL, out->len, splice_flags);
+	if (res == -1) {
+		res = -errno;
+		perror("fuse: splice from pipe");
+		goto clear_pipe;
+	}
+	if (res != out->len) {
+		res = -EIO;
+		fprintf(stderr, "fuse: short splice from pipe: %u/%u\n",
+			res, out->len);
+		goto clear_pipe;
+	}
+	return 0;
+
+clear_pipe:
+	fuse_ll_clear_pipe(f);
+	return res;
+
+fallback:
+	return fuse_send_data_iov_fallback(f, ch, iov, iov_count, buf, len);
+}
+#else
+static int fuse_send_data_iov(struct fuse_ll *f, struct fuse_chan *ch,
+			       struct iovec *iov, int iov_count,
+			       struct fuse_bufvec *buf, unsigned int flags)
+{
+	size_t len = fuse_buf_size(buf);
+	(void) flags;
+
+	return fuse_send_data_iov_fallback(f, ch, iov, iov_count, buf, len);
+}
+#endif
+
+int fuse_reply_data(fuse_req_t req, struct fuse_bufvec *bufv,
+		    enum fuse_buf_copy_flags flags)
+{
+	struct iovec iov[2];
+	struct fuse_out_header out;
+	int res;
+
+	iov[0].iov_base = &out;
+	iov[0].iov_len = sizeof(struct fuse_out_header);
+
+	out.unique = req->unique;
+	out.error = 0;
+
+	res = fuse_send_data_iov(req->f, req->ch, iov, 1, bufv, flags);
+	if (res <= 0) {
+		fuse_free_req(req);
+		return res;
+	} else {
+		return fuse_reply_err(req, res);
+	}
+}
+
 int fuse_reply_statfs(fuse_req_t req, const struct statvfs *stbuf)
 {
 	struct fuse_statfs_out arg;
@@ -402,7 +800,7 @@ int fuse_reply_xattr(fuse_req_t req, size_t count)
 	return send_reply_ok(req, &arg, sizeof(arg));
 }
 
-int fuse_reply_lock(fuse_req_t req, struct flock *lock)
+int fuse_reply_lock(fuse_req_t req, const struct flock *lock)
 {
 	struct fuse_lk_out arg;
 
@@ -429,13 +827,34 @@ int fuse_reply_bmap(fuse_req_t req, uint64_t idx)
 	return send_reply_ok(req, &arg, sizeof(arg));
 }
 
+static struct fuse_ioctl_iovec *fuse_ioctl_iovec_copy(const struct iovec *iov,
+						      size_t count)
+{
+	struct fuse_ioctl_iovec *fiov;
+	size_t i;
+
+	fiov = malloc(sizeof(fiov[0]) * count);
+	if (!fiov)
+		return NULL;
+
+	for (i = 0; i < count; i++) {
+		fiov[i].base = (uintptr_t) iov[i].iov_base;
+		fiov[i].len = iov[i].iov_len;
+	}
+
+	return fiov;
+}
+
 int fuse_reply_ioctl_retry(fuse_req_t req,
 			   const struct iovec *in_iov, size_t in_count,
 			   const struct iovec *out_iov, size_t out_count)
 {
 	struct fuse_ioctl_out arg;
+	struct fuse_ioctl_iovec *in_fiov = NULL;
+	struct fuse_ioctl_iovec *out_fiov = NULL;
 	struct iovec iov[4];
 	size_t count = 1;
+	int res;
 
 	memset(&arg, 0, sizeof(arg));
 	arg.flags |= FUSE_IOCTL_RETRY;
@@ -445,19 +864,55 @@ int fuse_reply_ioctl_retry(fuse_req_t req,
 	iov[count].iov_len = sizeof(arg);
 	count++;
 
-	if (in_count) {
-		iov[count].iov_base = (void *)in_iov;
-		iov[count].iov_len = sizeof(in_iov[0]) * in_count;
-		count++;
-	}
+	if (req->f->conn.proto_minor < 16) {
+		if (in_count) {
+			iov[count].iov_base = (void *)in_iov;
+			iov[count].iov_len = sizeof(in_iov[0]) * in_count;
+			count++;
+		}
 
-	if (out_count) {
-		iov[count].iov_base = (void *)out_iov;
-		iov[count].iov_len = sizeof(out_iov[0]) * out_count;
-		count++;
+		if (out_count) {
+			iov[count].iov_base = (void *)out_iov;
+			iov[count].iov_len = sizeof(out_iov[0]) * out_count;
+			count++;
+		}
+	} else {
+		/* Can't handle non-compat 64bit ioctls on 32bit */
+		if (sizeof(void *) == 4 && req->ioctl_64bit) {
+			res = fuse_reply_err(req, EINVAL);
+			goto out;
+		}
+
+		if (in_count) {
+			in_fiov = fuse_ioctl_iovec_copy(in_iov, in_count);
+			if (!in_fiov)
+				goto enomem;
+
+			iov[count].iov_base = (void *)in_fiov;
+			iov[count].iov_len = sizeof(in_fiov[0]) * in_count;
+			count++;
+		}
+		if (out_count) {
+			out_fiov = fuse_ioctl_iovec_copy(out_iov, out_count);
+			if (!out_fiov)
+				goto enomem;
+
+			iov[count].iov_base = (void *)out_fiov;
+			iov[count].iov_len = sizeof(out_fiov[0]) * out_count;
+			count++;
+		}
 	}
 
-	return send_reply_iov(req, 0, iov, count);
+	res = send_reply_iov(req, 0, iov, count);
+out:
+	free(in_fiov);
+	free(out_fiov);
+
+	return res;
+
+enomem:
+	res = fuse_reply_err(req, ENOMEM);
+	goto out;
 }
 
 int fuse_reply_ioctl(fuse_req_t req, int result, const void *buf, size_t size)
@@ -489,10 +944,8 @@ int fuse_reply_ioctl_iov(fuse_req_t req, int result, const struct iovec *iov,
 	int res;
 
 	padded_iov = malloc((count + 2) * sizeof(struct iovec));
-	if (padded_iov == NULL) {
-                printf("ENOMEM fuse_reply_err\n");
-		return fuse_reply_err(req, -ENOMEM);
-	}
+	if (padded_iov == NULL)
+		return fuse_reply_err(req, ENOMEM);
 
 	memset(&arg, 0, sizeof(arg));
 	arg.result = result;
@@ -523,10 +976,8 @@ static void do_lookup(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 
 	if (req->f->op.lookup)
 		req->f->op.lookup(req, nodeid, name);
-	else {
-                printf("ENOSYS do_lookup\n");
+	else
 		fuse_reply_err(req, ENOSYS);
-	}
 }
 
 static void do_forget(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -539,6 +990,40 @@ static void do_forget(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 		fuse_reply_none(req);
 }
 
+static void do_batch_forget(fuse_req_t req, fuse_ino_t nodeid,
+			    const void *inarg)
+{
+	struct fuse_batch_forget_in *arg = (void *) inarg;
+	struct fuse_forget_one *param = (void *) PARAM(arg);
+	unsigned int i;
+
+	(void) nodeid;
+
+	if (req->f->op.forget_multi) {
+		req->f->op.forget_multi(req, arg->count,
+				     (struct fuse_forget_data *) param);
+	} else if (req->f->op.forget) {
+		for (i = 0; i < arg->count; i++) {
+			struct fuse_forget_one *forget = &param[i];
+			struct fuse_req *dummy_req;
+
+			dummy_req = fuse_ll_alloc_req(req->f);
+			if (dummy_req == NULL)
+				break;
+
+			dummy_req->unique = req->unique;
+			dummy_req->ctx = req->ctx;
+			dummy_req->ch = NULL;
+
+			req->f->op.forget(dummy_req, forget->nodeid,
+					  forget->nlookup);
+		}
+		fuse_reply_none(req);
+	} else {
+		fuse_reply_none(req);
+	}
+}
+
 static void do_getattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
 	struct fuse_file_info *fip = NULL;
@@ -557,10 +1042,8 @@ static void do_getattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 
 	if (req->f->op.getattr)
 		req->f->op.getattr(req, nodeid, fip);
-	else {
-		printf("ENOSYS do_getattr\n");
+	else
 		fuse_reply_err(req, ENOSYS);
-	}
 }
 
 static void do_setattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -591,10 +1074,8 @@ static void do_setattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 			FUSE_SET_ATTR_MTIME_NOW;
 
 		req->f->op.setattr(req, nodeid, &stbuf, arg->valid, fi);
-	} else {
-		printf("ENOSYS do_setattr\n");
+	} else
 		fuse_reply_err(req, ENOSYS);
-	}
 }
 
 static void do_access(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -603,10 +1084,8 @@ static void do_access(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 
 	if (req->f->op.access)
 		req->f->op.access(req, nodeid, arg->mask);
-	else {
-		printf("ENOSYS do_access\n");
+	else
 		fuse_reply_err(req, ENOSYS);
-	}
 }
 
 static void do_readlink(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -615,10 +1094,8 @@ static void do_readlink(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 
 	if (req->f->op.readlink)
 		req->f->op.readlink(req, nodeid);
-	else {
-		printf("ENOSYS do_readlink\n");
+	else
 		fuse_reply_err(req, ENOSYS);
-	}
 }
 
 static void do_mknod(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -633,10 +1110,8 @@ static void do_mknod(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 
 	if (req->f->op.mknod)
 		req->f->op.mknod(req, nodeid, name, arg->mode, arg->rdev);
-	else {
-		printf("ENOSYS do_mknod\n");
+	else
 		fuse_reply_err(req, ENOSYS);
-	}
 }
 
 static void do_mkdir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -648,10 +1123,8 @@ static void do_mkdir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 
 	if (req->f->op.mkdir)
 		req->f->op.mkdir(req, nodeid, PARAM(arg), arg->mode);
-	else {
-		printf("ENOSYS do_mkdir\n");
+	else
 		fuse_reply_err(req, ENOSYS);
-	}
 }
 
 static void do_unlink(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -660,10 +1133,8 @@ static void do_unlink(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 
 	if (req->f->op.unlink)
 		req->f->op.unlink(req, nodeid, name);
-	else {
-		printf("ENOSYS do_unlink\n");
+	else
 		fuse_reply_err(req, ENOSYS);
-	}
 }
 
 static void do_rmdir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -672,10 +1143,8 @@ static void do_rmdir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 
 	if (req->f->op.rmdir)
 		req->f->op.rmdir(req, nodeid, name);
-	else {
-		printf("ENOSYS do_rmdir\n");
+	else
 		fuse_reply_err(req, ENOSYS);
-	}
 }
 
 static void do_symlink(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -685,10 +1154,8 @@ static void do_symlink(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 
 	if (req->f->op.symlink)
 		req->f->op.symlink(req, linkname, nodeid, name);
-	else {
-		printf("ENOSYS do_symlink\n");
+	else
 		fuse_reply_err(req, ENOSYS);
-	}
 }
 
 static void do_rename(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -699,10 +1166,8 @@ static void do_rename(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 
 	if (req->f->op.rename)
 		req->f->op.rename(req, nodeid, oldname, arg->newdir, newname);
-	else {
-		printf("ENOSYS do_rename\n");
+	else
 		fuse_reply_err(req, ENOSYS);
-	}
 }
 
 static void do_link(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -711,10 +1176,8 @@ static void do_link(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 
 	if (req->f->op.link)
 		req->f->op.link(req, arg->oldnodeid, nodeid, PARAM(arg));
-	else {
-		printf("ENOSYS do_link\n");
+	else
 		fuse_reply_err(req, ENOSYS);
-	}
 }
 
 static void do_create(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -734,10 +1197,8 @@ static void do_create(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 			name = (char *) inarg + sizeof(struct fuse_open_in);
 
 		req->f->op.create(req, nodeid, name, arg->mode, &fi);
-	} else {
-		printf("ENOSYS do_create\n");
+	} else
 		fuse_reply_err(req, ENOSYS);
-	}
 }
 
 static void do_open(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -769,10 +1230,8 @@ static void do_read(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 			fi.flags = arg->flags;
 		}
 		req->f->op.read(req, nodeid, arg->size, arg->offset, &fi);
-	} else {
-		printf("ENOSYS do_read\n");
+	} else
 		fuse_reply_err(req, ENOSYS);
-	}
 }
 
 static void do_write(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -797,10 +1256,53 @@ static void do_write(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 	if (req->f->op.write)
 		req->f->op.write(req, nodeid, param, arg->size,
 				 arg->offset, &fi);
-	else {
-		printf("ENOSYS do_write\n");
+	else
 		fuse_reply_err(req, ENOSYS);
+}
+
+static void do_write_buf(fuse_req_t req, fuse_ino_t nodeid, const void *inarg,
+			 const struct fuse_buf *ibuf)
+{
+	struct fuse_ll *f = req->f;
+	struct fuse_bufvec bufv = {
+		.buf[0] = *ibuf,
+		.count = 1,
+	};
+	struct fuse_write_in *arg = (struct fuse_write_in *) inarg;
+	struct fuse_file_info fi;
+
+	memset(&fi, 0, sizeof(fi));
+	fi.fh = arg->fh;
+	fi.fh_old = fi.fh;
+	fi.writepage = arg->write_flags & 1;
+
+	if (req->f->conn.proto_minor < 9) {
+		bufv.buf[0].mem = ((char *) arg) + FUSE_COMPAT_WRITE_IN_SIZE;
+		bufv.buf[0].size -= sizeof(struct fuse_in_header) +
+			FUSE_COMPAT_WRITE_IN_SIZE;
+		assert(!(bufv.buf[0].flags & FUSE_BUF_IS_FD));
+	} else {
+		fi.lock_owner = arg->lock_owner;
+		fi.flags = arg->flags;
+		if (!(bufv.buf[0].flags & FUSE_BUF_IS_FD))
+			bufv.buf[0].mem = PARAM(arg);
+
+		bufv.buf[0].size -= sizeof(struct fuse_in_header) +
+			sizeof(struct fuse_write_in);
 	}
+	if (bufv.buf[0].size < arg->size) {
+		fprintf(stderr, "fuse: do_write_buf: buffer size too small\n");
+		fuse_reply_err(req, EIO);
+		goto out;
+	}
+	bufv.buf[0].size = arg->size;
+
+	req->f->op.write_buf(req, nodeid, &bufv, arg->offset, &fi);
+
+out:
+	/* Need to reset the pipe if ->write_buf() didn't consume all data */
+	if ((ibuf->flags & FUSE_BUF_IS_FD) && bufv.idx < bufv.count)
+		fuse_ll_clear_pipe(f);
 }
 
 static void do_flush(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -817,10 +1319,8 @@ static void do_flush(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 
 	if (req->f->op.flush)
 		req->f->op.flush(req, nodeid, &fi);
-	else {
-		printf("ENOSYS do_flush\n");
+	else
 		fuse_reply_err(req, ENOSYS);
-	}
 }
 
 static void do_release(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -836,6 +1336,10 @@ static void do_release(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 		fi.flush = (arg->release_flags & FUSE_RELEASE_FLUSH) ? 1 : 0;
 		fi.lock_owner = arg->lock_owner;
 	}
+	if (arg->release_flags & FUSE_RELEASE_FLOCK_UNLOCK) {
+		fi.flock_release = 1;
+		fi.lock_owner = arg->lock_owner;
+	}
 
 	if (req->f->op.release)
 		req->f->op.release(req, nodeid, &fi);
@@ -854,10 +1358,8 @@ static void do_fsync(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 
 	if (req->f->op.fsync)
 		req->f->op.fsync(req, nodeid, arg->fsync_flags & 1, &fi);
-	else {
-		printf("ENOSYS do_fsync\n");
+	else
 		fuse_reply_err(req, ENOSYS);
-	}
 }
 
 static void do_opendir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -885,10 +1387,8 @@ static void do_readdir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 
 	if (req->f->op.readdir)
 		req->f->op.readdir(req, nodeid, arg->size, arg->offset, &fi);
-	else {
-		printf("ENOSYS do_fsync\n");
+	else
 		fuse_reply_err(req, ENOSYS);
-	}
 }
 
 static void do_releasedir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -918,10 +1418,8 @@ static void do_fsyncdir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 
 	if (req->f->op.fsyncdir)
 		req->f->op.fsyncdir(req, nodeid, arg->fsync_flags & 1, &fi);
-	else {
-		printf("ENOSYS do_fsyncdir\n");
+	else
 		fuse_reply_err(req, ENOSYS);
-	}
 }
 
 static void do_statfs(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -949,10 +1447,8 @@ static void do_setxattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 	if (req->f->op.setxattr)
 		req->f->op.setxattr(req, nodeid, name, value, arg->size,
 				    arg->flags);
-	else {
-		printf("ENOSYS do_setxattr\n");
+	else
 		fuse_reply_err(req, ENOSYS);
-	}
 }
 
 static void do_getxattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -961,10 +1457,8 @@ static void do_getxattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 
 	if (req->f->op.getxattr)
 		req->f->op.getxattr(req, nodeid, PARAM(arg), arg->size);
-	else {
-		printf("ENOSYS do_getxattr\n");
+	else
 		fuse_reply_err(req, ENOSYS);
-	}
 }
 
 static void do_listxattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -973,10 +1467,8 @@ static void do_listxattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 
 	if (req->f->op.listxattr)
 		req->f->op.listxattr(req, nodeid, arg->size);
-	else {
-		printf("ENOSYS do_listxattr\n");
+	else
 		fuse_reply_err(req, ENOSYS);
-	}
 }
 
 static void do_removexattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -985,10 +1477,8 @@ static void do_removexattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 
 	if (req->f->op.removexattr)
 		req->f->op.removexattr(req, nodeid, name);
-	else {
-		printf("ENOSYS do_removetxattr\n");
+	else
 		fuse_reply_err(req, ENOSYS);
-	}
 }
 
 static void convert_fuse_file_lock(struct fuse_file_lock *fl,
@@ -1018,10 +1508,8 @@ static void do_getlk(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 	convert_fuse_file_lock(&arg->lk, &flock);
 	if (req->f->op.getlk)
 		req->f->op.getlk(req, nodeid, &fi, &flock);
-	else {
-		printf("do_getlk ENOSYS\n");
+	else
 		fuse_reply_err(req, ENOSYS);
-	}
 }
 
 static void do_setlk_common(fuse_req_t req, fuse_ino_t nodeid,
@@ -1035,12 +1523,33 @@ static void do_setlk_common(fuse_req_t req, fuse_ino_t nodeid,
 	fi.fh = arg->fh;
 	fi.lock_owner = arg->owner;
 
-	convert_fuse_file_lock(&arg->lk, &flock);
-	if (req->f->op.setlk)
-		req->f->op.setlk(req, nodeid, &fi, &flock, sleep);
-	else {
-		printf("do_getlk ENOSYS\n");
-		fuse_reply_err(req, ENOSYS);
+	if (arg->lk_flags & FUSE_LK_FLOCK) {
+		int op = 0;
+
+		switch (arg->lk.type) {
+		case F_RDLCK:
+			op = LOCK_SH;
+			break;
+		case F_WRLCK:
+			op = LOCK_EX;
+			break;
+		case F_UNLCK:
+			op = LOCK_UN;
+			break;
+		}
+		if (!sleep)
+			op |= LOCK_NB;
+
+		if (req->f->op.flock)
+			req->f->op.flock(req, nodeid, &fi, op);
+		else
+			fuse_reply_err(req, ENOSYS);
+	} else {
+		convert_fuse_file_lock(&arg->lk, &flock);
+		if (req->f->op.setlk)
+			req->f->op.setlk(req, nodeid, &fi, &flock, sleep);
+		else
+			fuse_reply_err(req, ENOSYS);
 	}
 }
 
@@ -1141,10 +1650,8 @@ static void do_bmap(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 
 	if (req->f->op.bmap)
 		req->f->op.bmap(req, nodeid, arg->blocksize, arg->block);
-	else {
-		printf("do_bmap ENOSYS\n");
+	else
 		fuse_reply_err(req, ENOSYS);
-	}
 }
 
 static void do_ioctl(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
@@ -1154,18 +1661,27 @@ static void do_ioctl(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 	void *in_buf = arg->in_size ? PARAM(arg) : NULL;
 	struct fuse_file_info fi;
 
+	if (flags & FUSE_IOCTL_DIR &&
+	    !(req->f->conn.want & FUSE_CAP_IOCTL_DIR)) {
+		fuse_reply_err(req, ENOTTY);
+		return;
+	}
+
 	memset(&fi, 0, sizeof(fi));
 	fi.fh = arg->fh;
 	fi.fh_old = fi.fh;
 
+	if (sizeof(void *) == 4 && req->f->conn.proto_minor >= 16 &&
+	    !(flags & FUSE_IOCTL_32BIT)) {
+		req->ioctl_64bit = 1;
+	}
+
 	if (req->f->op.ioctl)
 		req->f->op.ioctl(req, nodeid, arg->cmd,
 				 (void *)(uintptr_t)arg->arg, &fi, flags,
 				 in_buf, arg->in_size, arg->out_size);
-	else {
-		printf("do_ioctl ENOSYS\n");
+	else
 		fuse_reply_err(req, ENOSYS);
-	}
 }
 
 void fuse_pollhandle_destroy(struct fuse_pollhandle *ph)
@@ -1188,7 +1704,6 @@ static void do_poll(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 		if (arg->flags & FUSE_POLL_SCHEDULE_NOTIFY) {
 			ph = malloc(sizeof(struct fuse_pollhandle));
 			if (ph == NULL) {
-				printf("ENOMEM do_poll\n");
 				fuse_reply_err(req, ENOMEM);
 				return;
 			}
@@ -1199,11 +1714,24 @@ static void do_poll(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 
 		req->f->op.poll(req, nodeid, &fi, ph);
 	} else {
-		printf("ENOSYS do_poll\n");
 		fuse_reply_err(req, ENOSYS);
 	}
 }
 
+static void do_fallocate(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+	struct fuse_fallocate_in *arg = (struct fuse_fallocate_in *) inarg;
+	struct fuse_file_info fi;
+
+	memset(&fi, 0, sizeof(fi));
+	fi.fh = arg->fh;
+
+	if (req->f->op.fallocate)
+		req->f->op.fallocate(req, nodeid, arg->mode, arg->offset, arg->length, &fi);
+	else
+		fuse_reply_err(req, ENOSYS);
+}
+
 static void do_init(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
 	struct fuse_init_in *arg = (struct fuse_init_in *) inarg;
@@ -1232,7 +1760,6 @@ static void do_init(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 	if (arg->major < 7) {
 		fprintf(stderr, "fuse: unsupported protocol version: %u.%u\n",
 			arg->major, arg->minor);
-		printf("EPROTO do_init\n");
 		fuse_reply_err(req, EPROTO);
 		return;
 	}
@@ -1260,15 +1787,36 @@ static void do_init(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 			f->conn.capable |= FUSE_CAP_BIG_WRITES;
 		if (arg->flags & FUSE_DONT_MASK)
 			f->conn.capable |= FUSE_CAP_DONT_MASK;
+		if (arg->flags & FUSE_FLOCK_LOCKS)
+			f->conn.capable |= FUSE_CAP_FLOCK_LOCKS;
 	} else {
 		f->conn.async_read = 0;
 		f->conn.max_readahead = 0;
 	}
 
+	if (req->f->conn.proto_minor >= 14) {
+#ifdef HAVE_SPLICE
+#ifdef HAVE_VMSPLICE
+		f->conn.capable |= FUSE_CAP_SPLICE_WRITE | FUSE_CAP_SPLICE_MOVE;
+		if (f->splice_write)
+			f->conn.want |= FUSE_CAP_SPLICE_WRITE;
+		if (f->splice_move)
+			f->conn.want |= FUSE_CAP_SPLICE_MOVE;
+#endif
+		f->conn.capable |= FUSE_CAP_SPLICE_READ;
+		if (f->splice_read)
+			f->conn.want |= FUSE_CAP_SPLICE_READ;
+#endif
+	}
+	if (req->f->conn.proto_minor >= 18)
+		f->conn.capable |= FUSE_CAP_IOCTL_DIR;
+
 	if (f->atomic_o_trunc)
 		f->conn.want |= FUSE_CAP_ATOMIC_O_TRUNC;
-	if (f->op.getlk && f->op.setlk && !f->no_remote_lock)
+	if (f->op.getlk && f->op.setlk && !f->no_remote_posix_lock)
 		f->conn.want |= FUSE_CAP_POSIX_LOCKS;
+	if (f->op.flock && !f->no_remote_flock)
+		f->conn.want |= FUSE_CAP_FLOCK_LOCKS;
 	if (f->big_writes)
 		f->conn.want |= FUSE_CAP_BIG_WRITES;
 
@@ -1286,6 +1834,13 @@ static void do_init(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 	if (f->op.init)
 		f->op.init(f->userdata, &f->conn);
 
+	if (f->no_splice_read)
+		f->conn.want &= ~FUSE_CAP_SPLICE_READ;
+	if (f->no_splice_write)
+		f->conn.want &= ~FUSE_CAP_SPLICE_WRITE;
+	if (f->no_splice_move)
+		f->conn.want &= ~FUSE_CAP_SPLICE_MOVE;
+
 	if (f->conn.async_read || (f->conn.want & FUSE_CAP_ASYNC_READ))
 		outarg.flags |= FUSE_ASYNC_READ;
 	if (f->conn.want & FUSE_CAP_POSIX_LOCKS)
@@ -1298,8 +1853,23 @@ static void do_init(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 		outarg.flags |= FUSE_BIG_WRITES;
 	if (f->conn.want & FUSE_CAP_DONT_MASK)
 		outarg.flags |= FUSE_DONT_MASK;
+	if (f->conn.want & FUSE_CAP_FLOCK_LOCKS)
+		outarg.flags |= FUSE_FLOCK_LOCKS;
 	outarg.max_readahead = f->conn.max_readahead;
 	outarg.max_write = f->conn.max_write;
+	if (f->conn.proto_minor >= 13) {
+		if (f->conn.max_background >= (1 << 16))
+			f->conn.max_background = (1 << 16) - 1;
+		if (f->conn.congestion_threshold > f->conn.max_background)
+			f->conn.congestion_threshold = f->conn.max_background;
+		if (!f->conn.congestion_threshold) {
+			f->conn.congestion_threshold =
+				f->conn.max_background * 3 / 4;
+		}
+
+		outarg.max_background = f->conn.max_background;
+		outarg.congestion_threshold = f->conn.congestion_threshold;
+	}
 
 	if (f->debug) {
 		fprintf(stderr, "   INIT: %u.%u\n", outarg.major, outarg.minor);
@@ -1307,6 +1877,10 @@ static void do_init(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 		fprintf(stderr, "   max_readahead=0x%08x\n",
 			outarg.max_readahead);
 		fprintf(stderr, "   max_write=0x%08x\n", outarg.max_write);
+		fprintf(stderr, "   max_background=%i\n",
+			outarg.max_background);
+		fprintf(stderr, "   congestion_threshold=%i\n",
+		        outarg.congestion_threshold);
 	}
 
 	send_reply_ok(req, &outarg, arg->minor < 5 ? 8 : sizeof(outarg));
@@ -1326,22 +1900,65 @@ static void do_destroy(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 	send_reply_ok(req, NULL, 0);
 }
 
+static void list_del_nreq(struct fuse_notify_req *nreq)
+{
+	struct fuse_notify_req *prev = nreq->prev;
+	struct fuse_notify_req *next = nreq->next;
+	prev->next = next;
+	next->prev = prev;
+}
+
+static void list_add_nreq(struct fuse_notify_req *nreq,
+			  struct fuse_notify_req *next)
+{
+	struct fuse_notify_req *prev = next->prev;
+	nreq->next = next;
+	nreq->prev = prev;
+	prev->next = nreq;
+	next->prev = nreq;
+}
+
+static void list_init_nreq(struct fuse_notify_req *nreq)
+{
+	nreq->next = nreq;
+	nreq->prev = nreq;
+}
+
+static void do_notify_reply(fuse_req_t req, fuse_ino_t nodeid,
+			    const void *inarg, const struct fuse_buf *buf)
+{
+	struct fuse_ll *f = req->f;
+	struct fuse_notify_req *nreq;
+	struct fuse_notify_req *head;
+
+	pthread_mutex_lock(&f->lock);
+	head = &f->notify_list;
+	for (nreq = head->next; nreq != head; nreq = nreq->next) {
+		if (nreq->unique == req->unique) {
+			list_del_nreq(nreq);
+			break;
+		}
+	}
+	pthread_mutex_unlock(&f->lock);
+
+	if (nreq != head)
+		nreq->reply(nreq, req, nodeid, inarg, buf);
+}
+
 static int send_notify_iov(struct fuse_ll *f, struct fuse_chan *ch,
 			   int notify_code, struct iovec *iov, int count)
 {
 	struct fuse_out_header out;
 
+	if (!f->got_init)
+		return -ENOTCONN;
+
 	out.unique = 0;
 	out.error = notify_code;
 	iov[0].iov_base = &out;
 	iov[0].iov_len = sizeof(struct fuse_out_header);
-	out.len = iov_length(iov, count);
 
-	if (f->debug)
-		fprintf(stderr, "NOTIFY: code=%d count=%d length=%u\n",
-			notify_code, count, out.len);
-
-	return fuse_chan_send(ch, iov, count);
+	return fuse_send_msg(f, ch, iov, count);
 }
 
 int fuse_lowlevel_notify_poll(struct fuse_pollhandle *ph)
@@ -1411,6 +2028,170 @@ int fuse_lowlevel_notify_inval_entry(struct fuse_chan *ch, fuse_ino_t parent,
 	return send_notify_iov(f, ch, FUSE_NOTIFY_INVAL_ENTRY, iov, 3);
 }
 
+int fuse_lowlevel_notify_delete(struct fuse_chan *ch,
+				fuse_ino_t parent, fuse_ino_t child,
+				const char *name, size_t namelen)
+{
+	struct fuse_notify_delete_out outarg;
+	struct fuse_ll *f;
+	struct iovec iov[3];
+
+	if (!ch)
+		return -EINVAL;
+
+	f = (struct fuse_ll *)fuse_session_data(fuse_chan_session(ch));
+	if (!f)
+		return -ENODEV;
+
+	if (f->conn.proto_minor < 18)
+		return -ENOSYS;
+
+	outarg.parent = parent;
+	outarg.child = child;
+	outarg.namelen = namelen;
+	outarg.padding = 0;
+
+	iov[1].iov_base = &outarg;
+	iov[1].iov_len = sizeof(outarg);
+	iov[2].iov_base = (void *)name;
+	iov[2].iov_len = namelen + 1;
+
+	return send_notify_iov(f, ch, FUSE_NOTIFY_DELETE, iov, 3);
+}
+
+int fuse_lowlevel_notify_store(struct fuse_chan *ch, fuse_ino_t ino,
+			       off64_t offset, struct fuse_bufvec *bufv,
+			       enum fuse_buf_copy_flags flags)
+{
+	struct fuse_out_header out;
+	struct fuse_notify_store_out outarg;
+	struct fuse_ll *f;
+	struct iovec iov[3];
+	size_t size = fuse_buf_size(bufv);
+	int res;
+
+	if (!ch)
+		return -EINVAL;
+
+	f = (struct fuse_ll *)fuse_session_data(fuse_chan_session(ch));
+	if (!f)
+		return -ENODEV;
+
+	if (f->conn.proto_minor < 15)
+		return -ENOSYS;
+
+	out.unique = 0;
+	out.error = FUSE_NOTIFY_STORE;
+
+	outarg.nodeid = ino;
+	outarg.offset = offset;
+	outarg.size = size;
+
+	iov[0].iov_base = &out;
+	iov[0].iov_len = sizeof(out);
+	iov[1].iov_base = &outarg;
+	iov[1].iov_len = sizeof(outarg);
+
+	res = fuse_send_data_iov(f, ch, iov, 2, bufv, flags);
+	if (res > 0)
+		res = -res;
+
+	return res;
+}
+
+struct fuse_retrieve_req {
+	struct fuse_notify_req nreq;
+	void *cookie;
+};
+
+static void fuse_ll_retrieve_reply(struct fuse_notify_req *nreq,
+				   fuse_req_t req, fuse_ino_t ino,
+				   const void *inarg,
+				   const struct fuse_buf *ibuf)
+{
+	struct fuse_ll *f = req->f;
+	struct fuse_retrieve_req *rreq =
+		container_of(nreq, struct fuse_retrieve_req, nreq);
+	const struct fuse_notify_retrieve_in *arg = inarg;
+	struct fuse_bufvec bufv = {
+		.buf[0] = *ibuf,
+		.count = 1,
+	};
+
+	if (!(bufv.buf[0].flags & FUSE_BUF_IS_FD))
+		bufv.buf[0].mem = PARAM(arg);
+
+	bufv.buf[0].size -= sizeof(struct fuse_in_header) +
+		sizeof(struct fuse_notify_retrieve_in);
+
+	if (bufv.buf[0].size < arg->size) {
+		fprintf(stderr, "fuse: retrieve reply: buffer size too small\n");
+		fuse_reply_none(req);
+		goto out;
+	}
+	bufv.buf[0].size = arg->size;
+
+	if (req->f->op.retrieve_reply) {
+		req->f->op.retrieve_reply(req, rreq->cookie, ino,
+					  arg->offset, &bufv);
+	} else {
+		fuse_reply_none(req);
+	}
+out:
+	free(rreq);
+	if ((ibuf->flags & FUSE_BUF_IS_FD) && bufv.idx < bufv.count)
+		fuse_ll_clear_pipe(f);
+}
+
+int fuse_lowlevel_notify_retrieve(struct fuse_chan *ch, fuse_ino_t ino,
+				  size_t size, off64_t offset, void *cookie)
+{
+	struct fuse_notify_retrieve_out outarg;
+	struct fuse_ll *f;
+	struct iovec iov[2];
+	struct fuse_retrieve_req *rreq;
+	int err;
+
+	if (!ch)
+		return -EINVAL;
+
+	f = (struct fuse_ll *)fuse_session_data(fuse_chan_session(ch));
+	if (!f)
+		return -ENODEV;
+
+	if (f->conn.proto_minor < 15)
+		return -ENOSYS;
+
+	rreq = malloc(sizeof(*rreq));
+	if (rreq == NULL)
+		return -ENOMEM;
+
+	pthread_mutex_lock(&f->lock);
+	rreq->cookie = cookie;
+	rreq->nreq.unique = f->notify_ctr++;
+	rreq->nreq.reply = fuse_ll_retrieve_reply;
+	list_add_nreq(&rreq->nreq, &f->notify_list);
+	pthread_mutex_unlock(&f->lock);
+
+	outarg.notify_unique = rreq->nreq.unique;
+	outarg.nodeid = ino;
+	outarg.offset = offset;
+	outarg.size = size;
+
+	iov[1].iov_base = &outarg;
+	iov[1].iov_len = sizeof(outarg);
+
+	err = send_notify_iov(f, ch, FUSE_NOTIFY_RETRIEVE, iov, 2);
+	if (err) {
+		pthread_mutex_lock(&f->lock);
+		list_del_nreq(&rreq->nreq);
+		pthread_mutex_unlock(&f->lock);
+		free(rreq);
+	}
+
+	return err;
+}
+
 void *fuse_req_userdata(fuse_req_t req)
 {
 	return req->f->userdata;
@@ -1431,7 +2212,9 @@ const struct fuse_ctx *fuse_req_ctx_compat24(fuse_req_t req)
 {
 	return fuse_req_ctx(req);
 }
+#ifndef __NetBSD__
 FUSE_SYMVER(".symver fuse_req_ctx_compat24,fuse_req_ctx@FUSE_2.4");
+#endif
 
 
 void fuse_req_interrupt_func(fuse_req_t req, fuse_interrupt_func_t func,
@@ -1499,7 +2282,10 @@ static struct {
 	[FUSE_BMAP]	   = { do_bmap,	       "BMAP"	     },
 	[FUSE_IOCTL]	   = { do_ioctl,       "IOCTL"	     },
 	[FUSE_POLL]	   = { do_poll,        "POLL"	     },
+	[FUSE_FALLOCATE]   = { do_fallocate,   "FALLOCATE"   },
 	[FUSE_DESTROY]	   = { do_destroy,     "DESTROY"     },
+	[FUSE_NOTIFY_REPLY] = { (void *) 1,    "NOTIFY_REPLY" },
+	[FUSE_BATCH_FORGET] = { do_batch_forget, "BATCH_FORGET" },
 	[CUSE_INIT]	   = { cuse_lowlevel_init, "CUSE_INIT"   },
 };
 
@@ -1513,37 +2299,84 @@ static const char *opname(enum fuse_opcode opcode)
 		return fuse_ll_ops[opcode].name;
 }
 
-static void fuse_ll_process(void *data, const char *buf, size_t len,
-			    struct fuse_chan *ch)
+static int fuse_ll_copy_from_pipe(struct fuse_bufvec *dst,
+				  struct fuse_bufvec *src)
+{
+	int res = fuse_buf_copy(dst, src, 0);
+	if (res < 0) {
+		fprintf(stderr, "fuse: copy from pipe: %s\n", strerror(-res));
+		return res;
+	}
+	if (res < fuse_buf_size(dst)) {
+		fprintf(stderr, "fuse: copy from pipe: short read\n");
+		return -1;
+	}
+	return 0;
+}
+
+static void fuse_ll_process_buf(void *data, const struct fuse_buf *buf,
+				struct fuse_chan *ch)
 {
 	struct fuse_ll *f = (struct fuse_ll *) data;
-	struct fuse_in_header *in = (struct fuse_in_header *) buf;
-	const void *inarg = buf + sizeof(struct fuse_in_header);
+	const size_t write_header_size = sizeof(struct fuse_in_header) +
+		sizeof(struct fuse_write_in);
+	struct fuse_bufvec bufv = { .buf[0] = *buf, .count = 1 };
+	struct fuse_bufvec tmpbuf = FUSE_BUFVEC_INIT(write_header_size);
+	struct fuse_in_header *in;
+	const void *inarg;
 	struct fuse_req *req;
+	void *mbuf = NULL;
 	int err;
+	int res;
 
-	if (f->debug)
+	if (buf->flags & FUSE_BUF_IS_FD) {
+		if (buf->size < tmpbuf.buf[0].size)
+			tmpbuf.buf[0].size = buf->size;
+
+		mbuf = malloc(tmpbuf.buf[0].size);
+		if (mbuf == NULL) {
+			fprintf(stderr, "fuse: failed to allocate header\n");
+			goto clear_pipe;
+		}
+		tmpbuf.buf[0].mem = mbuf;
+
+		res = fuse_ll_copy_from_pipe(&tmpbuf, &bufv);
+		if (res < 0)
+			goto clear_pipe;
+
+		in = mbuf;
+	} else {
+		in = buf->mem;
+	}
+
+	if (f->debug) {
 		fprintf(stderr,
-			"unique: %llu, opcode: %s (%i), nodeid: %lu, insize: %zu\n",
+			"unique: %llu, opcode: %s (%i), nodeid: %lu, insize: %zu, pid: %u\n",
 			(unsigned long long) in->unique,
 			opname((enum fuse_opcode) in->opcode), in->opcode,
-			(unsigned long) in->nodeid, len);
+			(unsigned long) in->nodeid, buf->size, in->pid);
+	}
 
-	req = (struct fuse_req *) calloc(1, sizeof(struct fuse_req));
+	req = fuse_ll_alloc_req(f);
 	if (req == NULL) {
-		fprintf(stderr, "fuse: failed to allocate request\n");
-		return;
+		struct fuse_out_header out = {
+			.unique = in->unique,
+			.error = -ENOMEM,
+		};
+		struct iovec iov = {
+			.iov_base = &out,
+			.iov_len = sizeof(struct fuse_out_header),
+		};
+
+		fuse_send_msg(f, ch, &iov, 1);
+		goto clear_pipe;
 	}
 
-	req->f = f;
 	req->unique = in->unique;
 	req->ctx.uid = in->uid;
 	req->ctx.gid = in->gid;
 	req->ctx.pid = in->pid;
 	req->ch = ch;
-	req->ctr = 1;
-	list_init_req(req);
-	fuse_mutex_init(&req->lock);
 
 	err = EIO;
 	if (!f->got_init) {
@@ -1560,7 +2393,8 @@ static void fuse_ll_process(void *data, const char *buf, size_t len,
 		 in->opcode != FUSE_INIT && in->opcode != FUSE_READ &&
 		 in->opcode != FUSE_WRITE && in->opcode != FUSE_FSYNC &&
 		 in->opcode != FUSE_RELEASE && in->opcode != FUSE_READDIR &&
-		 in->opcode != FUSE_FSYNCDIR && in->opcode != FUSE_RELEASEDIR)
+		 in->opcode != FUSE_FSYNCDIR && in->opcode != FUSE_RELEASEDIR &&
+		 in->opcode != FUSE_NOTIFY_REPLY)
 		goto reply_err;
 
 	err = ENOSYS;
@@ -1572,16 +2406,61 @@ static void fuse_ll_process(void *data, const char *buf, size_t len,
 		intr = check_interrupt(f, req);
 		list_add_req(req, &f->list);
 		pthread_mutex_unlock(&f->lock);
-		if (intr) {
-			printf("EAGAIN fuse_llprocess\n");
+		if (intr)
 			fuse_reply_err(intr, EAGAIN);
-		}
 	}
-	fuse_ll_ops[in->opcode].func(req, in->nodeid, inarg);
+
+	if ((buf->flags & FUSE_BUF_IS_FD) && write_header_size < buf->size &&
+	    (in->opcode != FUSE_WRITE || !f->op.write_buf) &&
+	    in->opcode != FUSE_NOTIFY_REPLY) {
+		void *newmbuf;
+
+		err = ENOMEM;
+		newmbuf = realloc(mbuf, buf->size);
+		if (newmbuf == NULL)
+			goto reply_err;
+		mbuf = newmbuf;
+
+		tmpbuf = FUSE_BUFVEC_INIT(buf->size - write_header_size);
+		tmpbuf.buf[0].mem = mbuf + write_header_size;
+
+		res = fuse_ll_copy_from_pipe(&tmpbuf, &bufv);
+		err = -res;
+		if (res < 0)
+			goto reply_err;
+
+		in = mbuf;
+	}
+
+	inarg = (void *) &in[1];
+	if (in->opcode == FUSE_WRITE && f->op.write_buf)
+		do_write_buf(req, in->nodeid, inarg, buf);
+	else if (in->opcode == FUSE_NOTIFY_REPLY)
+		do_notify_reply(req, in->nodeid, inarg, buf);
+	else
+		fuse_ll_ops[in->opcode].func(req, in->nodeid, inarg);
+
+out_free:
+	free(mbuf);
 	return;
 
- reply_err:
+reply_err:
 	fuse_reply_err(req, err);
+clear_pipe:
+	if (buf->flags & FUSE_BUF_IS_FD)
+		fuse_ll_clear_pipe(f);
+	goto out_free;
+}
+
+static void fuse_ll_process(void *data, const char *buf, size_t len,
+			    struct fuse_chan *ch)
+{
+	struct fuse_buf fbuf = {
+		.mem = (void *) buf,
+		.size = len,
+	};
+
+	fuse_ll_process_buf(data, &fbuf, ch);
 }
 
 enum {
@@ -1589,17 +2468,29 @@ enum {
 	KEY_VERSION,
 };
 
-static struct fuse_opt fuse_ll_opts[] = {
+static const struct fuse_opt fuse_ll_opts[] = {
 	{ "debug", offsetof(struct fuse_ll, debug), 1 },
 	{ "-d", offsetof(struct fuse_ll, debug), 1 },
 	{ "allow_root", offsetof(struct fuse_ll, allow_root), 1 },
 	{ "max_write=%u", offsetof(struct fuse_ll, conn.max_write), 0 },
 	{ "max_readahead=%u", offsetof(struct fuse_ll, conn.max_readahead), 0 },
+	{ "max_background=%u", offsetof(struct fuse_ll, conn.max_background), 0 },
+	{ "congestion_threshold=%u",
+	  offsetof(struct fuse_ll, conn.congestion_threshold), 0 },
 	{ "async_read", offsetof(struct fuse_ll, conn.async_read), 1 },
 	{ "sync_read", offsetof(struct fuse_ll, conn.async_read), 0 },
 	{ "atomic_o_trunc", offsetof(struct fuse_ll, atomic_o_trunc), 1},
-	{ "no_remote_lock", offsetof(struct fuse_ll, no_remote_lock), 1},
+	{ "no_remote_lock", offsetof(struct fuse_ll, no_remote_posix_lock), 1},
+	{ "no_remote_lock", offsetof(struct fuse_ll, no_remote_flock), 1},
+	{ "no_remote_flock", offsetof(struct fuse_ll, no_remote_flock), 1},
+	{ "no_remote_posix_lock", offsetof(struct fuse_ll, no_remote_posix_lock), 1},
 	{ "big_writes", offsetof(struct fuse_ll, big_writes), 1},
+	{ "splice_write", offsetof(struct fuse_ll, splice_write), 1},
+	{ "no_splice_write", offsetof(struct fuse_ll, no_splice_write), 1},
+	{ "splice_move", offsetof(struct fuse_ll, splice_move), 1},
+	{ "no_splice_move", offsetof(struct fuse_ll, no_splice_move), 1},
+	{ "splice_read", offsetof(struct fuse_ll, splice_read), 1},
+	{ "no_splice_read", offsetof(struct fuse_ll, no_splice_read), 1},
 	FUSE_OPT_KEY("max_read=", FUSE_OPT_KEY_DISCARD),
 	FUSE_OPT_KEY("-h", KEY_HELP),
 	FUSE_OPT_KEY("--help", KEY_HELP),
@@ -1619,11 +2510,19 @@ static void fuse_ll_help(void)
 	fprintf(stderr,
 "    -o max_write=N         set maximum size of write requests\n"
 "    -o max_readahead=N     set maximum readahead\n"
+"    -o max_background=N    set number of maximum background requests\n"
+"    -o congestion_threshold=N  set kernel's congestion threshold\n"
 "    -o async_read          perform reads asynchronously (default)\n"
 "    -o sync_read           perform reads synchronously\n"
 "    -o atomic_o_trunc      enable atomic open+truncate support\n"
 "    -o big_writes          enable larger than 4kB writes\n"
-"    -o no_remote_lock      disable remote file locking\n");
+"    -o no_remote_lock      disable remote file locking\n"
+"    -o no_remote_flock     disable remote file locking (BSD)\n"
+"    -o no_remote_posix_lock disable remove file locking (POSIX)\n"
+"    -o [no_]splice_write   use splice to write to the fuse device\n"
+"    -o [no_]splice_move    move data while splicing to the fuse device\n"
+"    -o [no_]splice_read    use splice to read from the fuse device\n"
+);
 }
 
 static int fuse_ll_opt_proc(void *data, const char *arg, int key,
@@ -1655,17 +2554,142 @@ int fuse_lowlevel_is_lib_option(const char *opt)
 static void fuse_ll_destroy(void *data)
 {
 	struct fuse_ll *f = (struct fuse_ll *) data;
+	struct fuse_ll_pipe *llp;
 
 	if (f->got_init && !f->got_destroy) {
 		if (f->op.destroy)
 			f->op.destroy(f->userdata);
 	}
-
+	llp = pthread_getspecific(f->pipe_key);
+	if (llp != NULL)
+		fuse_ll_pipe_free(llp);
+	pthread_key_delete(f->pipe_key);
 	pthread_mutex_destroy(&f->lock);
 	free(f->cuse_data);
 	free(f);
 }
 
+static void fuse_ll_pipe_destructor(void *data)
+{
+	struct fuse_ll_pipe *llp = data;
+	fuse_ll_pipe_free(llp);
+}
+
+#ifdef HAVE_SPLICE
+static int fuse_ll_receive_buf(struct fuse_session *se, struct fuse_buf *buf,
+			       struct fuse_chan **chp)
+{
+	struct fuse_chan *ch = *chp;
+	struct fuse_ll *f = fuse_session_data(se);
+	size_t bufsize = buf->size;
+	struct fuse_ll_pipe *llp;
+	struct fuse_buf tmpbuf;
+	int err;
+	int res;
+
+	if (f->conn.proto_minor < 14 || !(f->conn.want & FUSE_CAP_SPLICE_READ))
+		goto fallback;
+
+	llp = fuse_ll_get_pipe(f);
+	if (llp == NULL)
+		goto fallback;
+
+	if (llp->size < bufsize) {
+		if (llp->can_grow) {
+			res = fcntl(llp->pipe[0], F_SETPIPE_SZ, bufsize);
+			if (res == -1) {
+				llp->can_grow = 0;
+				goto fallback;
+			}
+			llp->size = res;
+		}
+		if (llp->size < bufsize)
+			goto fallback;
+	}
+
+	res = splice(fuse_chan_fd(ch), NULL, llp->pipe[1], NULL, bufsize, 0);
+	err = errno;
+
+	if (fuse_session_exited(se))
+		return 0;
+
+	if (res == -1) {
+		if (err == ENODEV) {
+			fuse_session_exit(se);
+			return 0;
+		}
+		if (err != EINTR && err != EAGAIN)
+			perror("fuse: splice from device");
+		return -err;
+	}
+
+	if (res < sizeof(struct fuse_in_header)) {
+		fprintf(stderr, "short splice from fuse device\n");
+		return -EIO;
+	}
+
+	tmpbuf = (struct fuse_buf) {
+		.size = res,
+		.flags = FUSE_BUF_IS_FD,
+		.fd = llp->pipe[0],
+	};
+
+	/*
+	 * Don't bother with zero copy for small requests.
+	 * fuse_loop_mt() needs to check for FORGET so this more than
+	 * just an optimization.
+	 */
+	if (res < sizeof(struct fuse_in_header) +
+	    sizeof(struct fuse_write_in) + pagesize) {
+		struct fuse_bufvec src = { .buf[0] = tmpbuf, .count = 1 };
+		struct fuse_bufvec dst = { .buf[0] = *buf, .count = 1 };
+
+		res = fuse_buf_copy(&dst, &src, 0);
+		if (res < 0) {
+			fprintf(stderr, "fuse: copy from pipe: %s\n",
+				strerror(-res));
+			fuse_ll_clear_pipe(f);
+			return res;
+		}
+		if (res < tmpbuf.size) {
+			fprintf(stderr, "fuse: copy from pipe: short read\n");
+			fuse_ll_clear_pipe(f);
+			return -EIO;
+		}
+		buf->size = tmpbuf.size;
+		return buf->size;
+	}
+
+	*buf = tmpbuf;
+
+	return res;
+
+fallback:
+	res = fuse_chan_recv(chp, buf->mem, bufsize);
+	if (res <= 0)
+		return res;
+
+	buf->size = res;
+
+	return res;
+}
+#else
+static int fuse_ll_receive_buf(struct fuse_session *se, struct fuse_buf *buf,
+			       struct fuse_chan **chp)
+{
+	(void) se;
+
+	int res = fuse_chan_recv(chp, buf->mem, buf->size);
+	if (res <= 0)
+		return res;
+
+	buf->size = res;
+
+	return res;
+}
+#endif
+
+
 /*
  * always call fuse_lowlevel_new_common() internally, to work around a
  * misfeature in the FreeBSD runtime linker, which links the old
@@ -1675,6 +2699,7 @@ struct fuse_session *fuse_lowlevel_new_common(struct fuse_args *args,
 					      const struct fuse_lowlevel_ops *op,
 					      size_t op_size, void *userdata)
 {
+	int err;
 	struct fuse_ll *f;
 	struct fuse_session *se;
 	struct fuse_session_ops sop = {
@@ -1699,10 +2724,19 @@ struct fuse_session *fuse_lowlevel_new_common(struct fuse_args *args,
 	f->atomic_o_trunc = 0;
 	list_init_req(&f->list);
 	list_init_req(&f->interrupts);
+	list_init_nreq(&f->notify_list);
+	f->notify_ctr = 1;
 	fuse_mutex_init(&f->lock);
 
-	if (fuse_opt_parse(args, f, fuse_ll_opts, fuse_ll_opt_proc) == -1)
+	err = pthread_key_create(&f->pipe_key, fuse_ll_pipe_destructor);
+	if (err) {
+		fprintf(stderr, "fuse: failed to create thread specific key: %s\n",
+			strerror(err));
 		goto out_free;
+	}
+
+	if (fuse_opt_parse(args, f, fuse_ll_opts, fuse_ll_opt_proc) == -1)
+		goto out_key_destroy;
 
 	if (f->debug)
 		fprintf(stderr, "FUSE library version: %s\n", PACKAGE_VERSION);
@@ -1713,11 +2747,17 @@ struct fuse_session *fuse_lowlevel_new_common(struct fuse_args *args,
 
 	se = fuse_session_new(&sop, f);
 	if (!se)
-		goto out_free;
+		goto out_key_destroy;
+
+	se->receive_buf = fuse_ll_receive_buf;
+	se->process_buf = fuse_ll_process_buf;
 
 	return se;
 
+out_key_destroy:
+	pthread_key_delete(f->pipe_key);
 out_free:
+	pthread_mutex_destroy(&f->lock);
 	free(f);
 out:
 	return NULL;
@@ -1800,7 +2840,7 @@ int fuse_req_getgroups(fuse_req_t req, int size, gid_t list[])
 }
 #endif
 
-#ifndef __FreeBSD__
+#if !defined(__FreeBSD__) && !defined(__NetBSD__)
 
 static void fill_open_compat(struct fuse_open_out *arg,
 			     const struct fuse_file_info_compat *f)
@@ -1902,7 +2942,7 @@ FUSE_SYMVER(".symver fuse_reply_statfs_compat,fuse_reply_statfs@FUSE_2.4");
 FUSE_SYMVER(".symver fuse_reply_open_compat,fuse_reply_open@FUSE_2.4");
 FUSE_SYMVER(".symver fuse_lowlevel_new_compat,fuse_lowlevel_new@FUSE_2.4");
 
-#else /* __FreeBSD__ */
+#else /* __FreeBSD__ || __NetBSD__ */
 
 int fuse_sync_compat_args(struct fuse_args *args)
 {
@@ -1910,7 +2950,7 @@ int fuse_sync_compat_args(struct fuse_args *args)
 	return 0;
 }
 
-#endif /* __FreeBSD__ */
+#endif /* __FreeBSD__ || __NetBSD__ */
 
 struct fuse_session *fuse_lowlevel_new_compat25(struct fuse_args *args,
 				const struct fuse_lowlevel_ops_compat25 *op,