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Blame SOURCES/kvm-virtiofsd-Remove-unused-enum-fuse_buf_copy_flags.patch

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From 80237df2b22eca685037456e65d149fed4654165 Mon Sep 17 00:00:00 2001
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From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
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Date: Mon, 27 Jan 2020 19:00:48 +0100
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Subject: [PATCH 017/116] virtiofsd: Remove unused enum fuse_buf_copy_flags
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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RH-Author: Dr. David Alan Gilbert <dgilbert@redhat.com>
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Message-id: <20200127190227.40942-14-dgilbert@redhat.com>
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Patchwork-id: 93465
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O-Subject: [RHEL-AV-8.2 qemu-kvm PATCH 013/112] virtiofsd: Remove unused enum fuse_buf_copy_flags
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Bugzilla: 1694164
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RH-Acked-by: Philippe Mathieu-Daudé <philmd@redhat.com>
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RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
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RH-Acked-by: Sergio Lopez Pascual <slp@redhat.com>
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From: Xiao Yang <yangx.jy@cn.fujitsu.com>
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Signed-off-by: Xiao Yang <yangx.jy@cn.fujitsu.com>
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Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
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Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
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(cherry picked from commit 8c3fe75e0308ba2f01d160ace534b7e386cea808)
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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 tools/virtiofsd/buffer.c         |  7 +++---
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 tools/virtiofsd/fuse_common.h    | 46 +---------------------------------------
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 tools/virtiofsd/fuse_lowlevel.c  | 13 +++++-------
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 tools/virtiofsd/fuse_lowlevel.h  | 35 ++----------------------------
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 tools/virtiofsd/passthrough_ll.c |  4 ++--
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 5 files changed, 13 insertions(+), 92 deletions(-)
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diff --git a/tools/virtiofsd/buffer.c b/tools/virtiofsd/buffer.c
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index 5df946c..4d507f3 100644
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--- a/tools/virtiofsd/buffer.c
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+++ b/tools/virtiofsd/buffer.c
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@@ -171,7 +171,7 @@ static ssize_t fuse_buf_fd_to_fd(const struct fuse_buf *dst, size_t dst_off,
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 static ssize_t fuse_buf_copy_one(const struct fuse_buf *dst, size_t dst_off,
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                                  const struct fuse_buf *src, size_t src_off,
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-                                 size_t len, enum fuse_buf_copy_flags flags)
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+                                 size_t len)
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 {
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     int src_is_fd = src->flags & FUSE_BUF_IS_FD;
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     int dst_is_fd = dst->flags & FUSE_BUF_IS_FD;
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@@ -224,8 +224,7 @@ static int fuse_bufvec_advance(struct fuse_bufvec *bufv, size_t len)
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     return 1;
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 }
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-ssize_t fuse_buf_copy(struct fuse_bufvec *dstv, struct fuse_bufvec *srcv,
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-                      enum fuse_buf_copy_flags flags)
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+ssize_t fuse_buf_copy(struct fuse_bufvec *dstv, struct fuse_bufvec *srcv)
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 {
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     size_t copied = 0;
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@@ -249,7 +248,7 @@ ssize_t fuse_buf_copy(struct fuse_bufvec *dstv, struct fuse_bufvec *srcv,
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         dst_len = dst->size - dstv->off;
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         len = min_size(src_len, dst_len);
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-        res = fuse_buf_copy_one(dst, dstv->off, src, srcv->off, len, flags);
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+        res = fuse_buf_copy_one(dst, dstv->off, src, srcv->off, len);
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         if (res < 0) {
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             if (!copied) {
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                 return res;
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diff --git a/tools/virtiofsd/fuse_common.h b/tools/virtiofsd/fuse_common.h
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index bd9bf86..0cb33ac 100644
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--- a/tools/virtiofsd/fuse_common.h
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+++ b/tools/virtiofsd/fuse_common.h
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@@ -605,48 +605,6 @@ enum fuse_buf_flags {
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 };
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 /**
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- * Buffer copy flags
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- */
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-enum fuse_buf_copy_flags {
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-    /**
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-     * Don't use splice(2)
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-     *
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-     * Always fall back to using read and write instead of
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-     * splice(2) to copy data from one file descriptor to another.
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-     *
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-     * If this flag is not set, then only fall back if splice is
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-     * unavailable.
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-     */
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-    FUSE_BUF_NO_SPLICE = (1 << 1),
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-
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-    /**
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-     * Force splice
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-     *
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-     * Always use splice(2) to copy data from one file descriptor
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-     * to another.  If splice is not available, return -EINVAL.
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-     */
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-    FUSE_BUF_FORCE_SPLICE = (1 << 2),
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-
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-    /**
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-     * Try to move data with splice.
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-     *
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-     * If splice is used, try to move pages from the source to the
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-     * destination instead of copying.  See documentation of
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-     * SPLICE_F_MOVE in splice(2) man page.
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-     */
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-    FUSE_BUF_SPLICE_MOVE = (1 << 3),
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-
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-    /**
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-     * Don't block on the pipe when copying data with splice
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-     *
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-     * Makes the operations on the pipe non-blocking (if the pipe
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-     * is full or empty).  See SPLICE_F_NONBLOCK in the splice(2)
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-     * man page.
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-     */
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-    FUSE_BUF_SPLICE_NONBLOCK = (1 << 4),
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-};
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-
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-/**
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  * Single data buffer
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  *
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  * Generic data buffer for I/O, extended attributes, etc...  Data may
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@@ -741,11 +699,9 @@ size_t fuse_buf_size(const struct fuse_bufvec *bufv);
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  *
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  * @param dst destination buffer vector
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  * @param src source buffer vector
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- * @param flags flags controlling the copy
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  * @return actual number of bytes copied or -errno on error
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  */
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-ssize_t fuse_buf_copy(struct fuse_bufvec *dst, struct fuse_bufvec *src,
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-                      enum fuse_buf_copy_flags flags);
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+ssize_t fuse_buf_copy(struct fuse_bufvec *dst, struct fuse_bufvec *src);
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 /*
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  * Signal handling
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diff --git a/tools/virtiofsd/fuse_lowlevel.c b/tools/virtiofsd/fuse_lowlevel.c
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index eb0ec49..3da80de 100644
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--- a/tools/virtiofsd/fuse_lowlevel.c
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+++ b/tools/virtiofsd/fuse_lowlevel.c
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@@ -490,16 +490,14 @@ static int fuse_send_data_iov_fallback(struct fuse_session *se,
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 static int fuse_send_data_iov(struct fuse_session *se, struct fuse_chan *ch,
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                               struct iovec *iov, int iov_count,
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-                              struct fuse_bufvec *buf, unsigned int flags)
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+                              struct fuse_bufvec *buf)
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 {
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     size_t len = fuse_buf_size(buf);
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-    (void)flags;
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     return fuse_send_data_iov_fallback(se, ch, iov, iov_count, buf, len);
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 }
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-int fuse_reply_data(fuse_req_t req, struct fuse_bufvec *bufv,
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-                    enum fuse_buf_copy_flags flags)
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+int fuse_reply_data(fuse_req_t req, struct fuse_bufvec *bufv)
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 {
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     struct iovec iov[2];
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     struct fuse_out_header out;
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@@ -511,7 +509,7 @@ int fuse_reply_data(fuse_req_t req, struct fuse_bufvec *bufv,
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     out.unique = req->unique;
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     out.error = 0;
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-    res = fuse_send_data_iov(req->se, req->ch, iov, 1, bufv, flags);
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+    res = fuse_send_data_iov(req->se, req->ch, iov, 1, bufv);
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     if (res <= 0) {
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         fuse_free_req(req);
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         return res;
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@@ -1969,8 +1967,7 @@ int fuse_lowlevel_notify_delete(struct fuse_session *se, fuse_ino_t parent,
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 }
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 int fuse_lowlevel_notify_store(struct fuse_session *se, fuse_ino_t ino,
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-                               off_t offset, struct fuse_bufvec *bufv,
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-                               enum fuse_buf_copy_flags flags)
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+                               off_t offset, struct fuse_bufvec *bufv)
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 {
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     struct fuse_out_header out;
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     struct fuse_notify_store_out outarg;
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@@ -1999,7 +1996,7 @@ int fuse_lowlevel_notify_store(struct fuse_session *se, fuse_ino_t ino,
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     iov[1].iov_base = &outarg;
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     iov[1].iov_len = sizeof(outarg);
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-    res = fuse_send_data_iov(se, NULL, iov, 2, bufv, flags);
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+    res = fuse_send_data_iov(se, NULL, iov, 2, bufv);
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     if (res > 0) {
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         res = -res;
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     }
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diff --git a/tools/virtiofsd/fuse_lowlevel.h b/tools/virtiofsd/fuse_lowlevel.h
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index 12a84b4..2fa225d 100644
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--- a/tools/virtiofsd/fuse_lowlevel.h
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+++ b/tools/virtiofsd/fuse_lowlevel.h
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@@ -1363,33 +1363,6 @@ int fuse_reply_buf(fuse_req_t req, const char *buf, size_t size);
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 /**
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  * Reply with data copied/moved from buffer(s)
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  *
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- * Zero copy data transfer ("splicing") will be used under
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- * the following circumstances:
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- *
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- * 1. FUSE_CAP_SPLICE_WRITE is set in fuse_conn_info.want, and
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- * 2. the kernel supports splicing from the fuse device
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- *    (FUSE_CAP_SPLICE_WRITE is set in fuse_conn_info.capable), and
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- * 3. *flags* does not contain FUSE_BUF_NO_SPLICE
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- * 4. The amount of data that is provided in file-descriptor backed
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- *    buffers (i.e., buffers for which bufv[n].flags == FUSE_BUF_FD)
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- *    is at least twice the page size.
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- *
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- * In order for SPLICE_F_MOVE to be used, the following additional
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- * conditions have to be fulfilled:
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- *
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- * 1. FUSE_CAP_SPLICE_MOVE is set in fuse_conn_info.want, and
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- * 2. the kernel supports it (i.e, FUSE_CAP_SPLICE_MOVE is set in
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-      fuse_conn_info.capable), and
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- * 3. *flags* contains FUSE_BUF_SPLICE_MOVE
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- *
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- * Note that, if splice is used, the data is actually spliced twice:
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- * once into a temporary pipe (to prepend header data), and then again
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- * into the kernel. If some of the provided buffers are memory-backed,
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- * the data in them is copied in step one and spliced in step two.
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- *
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- * The FUSE_BUF_SPLICE_FORCE_SPLICE and FUSE_BUF_SPLICE_NONBLOCK flags
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- * are silently ignored.
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- *
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  * Possible requests:
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  *   read, readdir, getxattr, listxattr
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  *
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@@ -1400,11 +1373,9 @@ int fuse_reply_buf(fuse_req_t req, const char *buf, size_t size);
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  *
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  * @param req request handle
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  * @param bufv buffer vector
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- * @param flags flags controlling the copy
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  * @return zero for success, -errno for failure to send reply
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  */
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-int fuse_reply_data(fuse_req_t req, struct fuse_bufvec *bufv,
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-                    enum fuse_buf_copy_flags flags);
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+int fuse_reply_data(fuse_req_t req, struct fuse_bufvec *bufv);
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 /**
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  * Reply with data vector
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@@ -1705,12 +1676,10 @@ int fuse_lowlevel_notify_delete(struct fuse_session *se, fuse_ino_t parent,
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  * @param ino the inode number
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  * @param offset the starting offset into the file to store to
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  * @param bufv buffer vector
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- * @param flags flags controlling the copy
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  * @return zero for success, -errno for failure
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  */
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 int fuse_lowlevel_notify_store(struct fuse_session *se, fuse_ino_t ino,
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-                               off_t offset, struct fuse_bufvec *bufv,
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-                               enum fuse_buf_copy_flags flags);
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+                               off_t offset, struct fuse_bufvec *bufv);
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 /*
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  * Utility functions
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diff --git a/tools/virtiofsd/passthrough_ll.c b/tools/virtiofsd/passthrough_ll.c
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index 9377718..126a56c 100644
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--- a/tools/virtiofsd/passthrough_ll.c
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+++ b/tools/virtiofsd/passthrough_ll.c
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@@ -931,7 +931,7 @@ static void lo_read(fuse_req_t req, fuse_ino_t ino, size_t size, off_t offset,
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     buf.buf[0].fd = fi->fh;
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     buf.buf[0].pos = offset;
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-    fuse_reply_data(req, &buf, FUSE_BUF_SPLICE_MOVE);
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+    fuse_reply_data(req, &buf;;
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 }
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 static void lo_write_buf(fuse_req_t req, fuse_ino_t ino,
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@@ -952,7 +952,7 @@ static void lo_write_buf(fuse_req_t req, fuse_ino_t ino,
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                  out_buf.buf[0].size, (unsigned long)off);
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     }
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-    res = fuse_buf_copy(&out_buf, in_buf, 0);
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+    res = fuse_buf_copy(&out_buf, in_buf);
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     if (res < 0) {
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         fuse_reply_err(req, -res);
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     } else {
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-- 
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1.8.3.1
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