From: Xiao Yang <yangx.jy@cn.fujitsu.com>
Date: Mon, 27 Jan 2020 19:00:48 +0000
Subject: [PATCH] virtiofsd: Remove unused enum fuse_buf_copy_flags
Signed-off-by: Xiao Yang <yangx.jy@cn.fujitsu.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
(cherry picked from commit 8c3fe75e0308ba2f01d160ace534b7e386cea808)
---
tools/virtiofsd/buffer.c | 7 +++--
tools/virtiofsd/fuse_common.h | 46 +-------------------------------
tools/virtiofsd/fuse_lowlevel.c | 13 ++++-----
tools/virtiofsd/fuse_lowlevel.h | 35 ++----------------------
tools/virtiofsd/passthrough_ll.c | 4 +--
5 files changed, 13 insertions(+), 92 deletions(-)
diff --git a/tools/virtiofsd/buffer.c b/tools/virtiofsd/buffer.c
index 5df946c82c..4d507f3302 100644
--- a/tools/virtiofsd/buffer.c
+++ b/tools/virtiofsd/buffer.c
@@ -171,7 +171,7 @@ static ssize_t fuse_buf_fd_to_fd(const struct fuse_buf *dst, size_t dst_off,
static ssize_t fuse_buf_copy_one(const struct fuse_buf *dst, size_t dst_off,
const struct fuse_buf *src, size_t src_off,
- size_t len, enum fuse_buf_copy_flags flags)
+ size_t len)
{
int src_is_fd = src->flags & FUSE_BUF_IS_FD;
int dst_is_fd = dst->flags & FUSE_BUF_IS_FD;
@@ -224,8 +224,7 @@ static int fuse_bufvec_advance(struct fuse_bufvec *bufv, size_t len)
return 1;
}
-ssize_t fuse_buf_copy(struct fuse_bufvec *dstv, struct fuse_bufvec *srcv,
- enum fuse_buf_copy_flags flags)
+ssize_t fuse_buf_copy(struct fuse_bufvec *dstv, struct fuse_bufvec *srcv)
{
size_t copied = 0;
@@ -249,7 +248,7 @@ ssize_t fuse_buf_copy(struct fuse_bufvec *dstv, struct fuse_bufvec *srcv,
dst_len = dst->size - dstv->off;
len = min_size(src_len, dst_len);
- res = fuse_buf_copy_one(dst, dstv->off, src, srcv->off, len, flags);
+ res = fuse_buf_copy_one(dst, dstv->off, src, srcv->off, len);
if (res < 0) {
if (!copied) {
return res;
diff --git a/tools/virtiofsd/fuse_common.h b/tools/virtiofsd/fuse_common.h
index bd9bf861f0..0cb33acc2f 100644
--- a/tools/virtiofsd/fuse_common.h
+++ b/tools/virtiofsd/fuse_common.h
@@ -604,48 +604,6 @@ enum fuse_buf_flags {
FUSE_BUF_FD_RETRY = (1 << 3),
};
-/**
- * Buffer copy flags
- */
-enum fuse_buf_copy_flags {
- /**
- * Don't use splice(2)
- *
- * Always fall back to using read and write instead of
- * splice(2) to copy data from one file descriptor to another.
- *
- * If this flag is not set, then only fall back if splice is
- * unavailable.
- */
- FUSE_BUF_NO_SPLICE = (1 << 1),
-
- /**
- * Force splice
- *
- * Always use splice(2) to copy data from one file descriptor
- * to another. If splice is not available, return -EINVAL.
- */
- FUSE_BUF_FORCE_SPLICE = (1 << 2),
-
- /**
- * Try to move data with splice.
- *
- * If splice is used, try to move pages from the source to the
- * destination instead of copying. See documentation of
- * SPLICE_F_MOVE in splice(2) man page.
- */
- FUSE_BUF_SPLICE_MOVE = (1 << 3),
-
- /**
- * Don't block on the pipe when copying data with splice
- *
- * Makes the operations on the pipe non-blocking (if the pipe
- * is full or empty). See SPLICE_F_NONBLOCK in the splice(2)
- * man page.
- */
- FUSE_BUF_SPLICE_NONBLOCK = (1 << 4),
-};
-
/**
* Single data buffer
*
@@ -741,11 +699,9 @@ size_t fuse_buf_size(const struct fuse_bufvec *bufv);
*
* @param dst destination buffer vector
* @param src source buffer vector
- * @param flags flags controlling the copy
* @return actual number of bytes copied or -errno on error
*/
-ssize_t fuse_buf_copy(struct fuse_bufvec *dst, struct fuse_bufvec *src,
- enum fuse_buf_copy_flags flags);
+ssize_t fuse_buf_copy(struct fuse_bufvec *dst, struct fuse_bufvec *src);
/*
* Signal handling
diff --git a/tools/virtiofsd/fuse_lowlevel.c b/tools/virtiofsd/fuse_lowlevel.c
index eb0ec49d38..3da80de233 100644
--- a/tools/virtiofsd/fuse_lowlevel.c
+++ b/tools/virtiofsd/fuse_lowlevel.c
@@ -490,16 +490,14 @@ static int fuse_send_data_iov_fallback(struct fuse_session *se,
static int fuse_send_data_iov(struct fuse_session *se, struct fuse_chan *ch,
struct iovec *iov, int iov_count,
- struct fuse_bufvec *buf, unsigned int flags)
+ struct fuse_bufvec *buf)
{
size_t len = fuse_buf_size(buf);
- (void)flags;
return fuse_send_data_iov_fallback(se, ch, iov, iov_count, buf, len);
}
-int fuse_reply_data(fuse_req_t req, struct fuse_bufvec *bufv,
- enum fuse_buf_copy_flags flags)
+int fuse_reply_data(fuse_req_t req, struct fuse_bufvec *bufv)
{
struct iovec iov[2];
struct fuse_out_header out;
@@ -511,7 +509,7 @@ int fuse_reply_data(fuse_req_t req, struct fuse_bufvec *bufv,
out.unique = req->unique;
out.error = 0;
- res = fuse_send_data_iov(req->se, req->ch, iov, 1, bufv, flags);
+ res = fuse_send_data_iov(req->se, req->ch, iov, 1, bufv);
if (res <= 0) {
fuse_free_req(req);
return res;
@@ -1969,8 +1967,7 @@ int fuse_lowlevel_notify_delete(struct fuse_session *se, fuse_ino_t parent,
}
int fuse_lowlevel_notify_store(struct fuse_session *se, fuse_ino_t ino,
- off_t offset, struct fuse_bufvec *bufv,
- enum fuse_buf_copy_flags flags)
+ off_t offset, struct fuse_bufvec *bufv)
{
struct fuse_out_header out;
struct fuse_notify_store_out outarg;
@@ -1999,7 +1996,7 @@ int fuse_lowlevel_notify_store(struct fuse_session *se, fuse_ino_t ino,
iov[1].iov_base = &outarg;
iov[1].iov_len = sizeof(outarg);
- res = fuse_send_data_iov(se, NULL, iov, 2, bufv, flags);
+ res = fuse_send_data_iov(se, NULL, iov, 2, bufv);
if (res > 0) {
res = -res;
}
diff --git a/tools/virtiofsd/fuse_lowlevel.h b/tools/virtiofsd/fuse_lowlevel.h
index 12a84b460f..2fa225d40b 100644
--- a/tools/virtiofsd/fuse_lowlevel.h
+++ b/tools/virtiofsd/fuse_lowlevel.h
@@ -1363,33 +1363,6 @@ int fuse_reply_buf(fuse_req_t req, const char *buf, size_t size);
/**
* Reply with data copied/moved from buffer(s)
*
- * Zero copy data transfer ("splicing") will be used under
- * the following circumstances:
- *
- * 1. FUSE_CAP_SPLICE_WRITE is set in fuse_conn_info.want, and
- * 2. the kernel supports splicing from the fuse device
- * (FUSE_CAP_SPLICE_WRITE is set in fuse_conn_info.capable), and
- * 3. *flags* does not contain FUSE_BUF_NO_SPLICE
- * 4. The amount of data that is provided in file-descriptor backed
- * buffers (i.e., buffers for which bufv[n].flags == FUSE_BUF_FD)
- * is at least twice the page size.
- *
- * In order for SPLICE_F_MOVE to be used, the following additional
- * conditions have to be fulfilled:
- *
- * 1. FUSE_CAP_SPLICE_MOVE is set in fuse_conn_info.want, and
- * 2. the kernel supports it (i.e, FUSE_CAP_SPLICE_MOVE is set in
- fuse_conn_info.capable), and
- * 3. *flags* contains FUSE_BUF_SPLICE_MOVE
- *
- * Note that, if splice is used, the data is actually spliced twice:
- * once into a temporary pipe (to prepend header data), and then again
- * into the kernel. If some of the provided buffers are memory-backed,
- * the data in them is copied in step one and spliced in step two.
- *
- * The FUSE_BUF_SPLICE_FORCE_SPLICE and FUSE_BUF_SPLICE_NONBLOCK flags
- * are silently ignored.
- *
* Possible requests:
* read, readdir, getxattr, listxattr
*
@@ -1400,11 +1373,9 @@ int fuse_reply_buf(fuse_req_t req, const char *buf, size_t size);
*
* @param req request handle
* @param bufv buffer vector
- * @param flags flags controlling the copy
* @return zero for success, -errno for failure to send reply
*/
-int fuse_reply_data(fuse_req_t req, struct fuse_bufvec *bufv,
- enum fuse_buf_copy_flags flags);
+int fuse_reply_data(fuse_req_t req, struct fuse_bufvec *bufv);
/**
* Reply with data vector
@@ -1705,12 +1676,10 @@ int fuse_lowlevel_notify_delete(struct fuse_session *se, fuse_ino_t parent,
* @param ino the inode number
* @param offset the starting offset into the file to store to
* @param bufv buffer vector
- * @param flags flags controlling the copy
* @return zero for success, -errno for failure
*/
int fuse_lowlevel_notify_store(struct fuse_session *se, fuse_ino_t ino,
- off_t offset, struct fuse_bufvec *bufv,
- enum fuse_buf_copy_flags flags);
+ off_t offset, struct fuse_bufvec *bufv);
/*
* Utility functions
diff --git a/tools/virtiofsd/passthrough_ll.c b/tools/virtiofsd/passthrough_ll.c
index 9377718d9d..126a56ccbd 100644
--- a/tools/virtiofsd/passthrough_ll.c
+++ b/tools/virtiofsd/passthrough_ll.c
@@ -931,7 +931,7 @@ static void lo_read(fuse_req_t req, fuse_ino_t ino, size_t size, off_t offset,
buf.buf[0].fd = fi->fh;
buf.buf[0].pos = offset;
- fuse_reply_data(req, &buf, FUSE_BUF_SPLICE_MOVE);
+ fuse_reply_data(req, &buf);
}
static void lo_write_buf(fuse_req_t req, fuse_ino_t ino,
@@ -952,7 +952,7 @@ static void lo_write_buf(fuse_req_t req, fuse_ino_t ino,
out_buf.buf[0].size, (unsigned long)off);
}
- res = fuse_buf_copy(&out_buf, in_buf, 0);
+ res = fuse_buf_copy(&out_buf, in_buf);
if (res < 0) {
fuse_reply_err(req, -res);
} else {