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authorDave Wallace <dwallacelf@gmail.com>2017-11-13 21:21:53 -0500
committerKeith Burns <alagalah@gmail.com>2017-11-14 03:44:25 +0000
commit227867f5d3fb1b1dacbaf2f426812417b72ef03a (patch)
tree6d7b603b196d170717d5f81e23f122ec38989fb9 /src/vcl/vcom_socket.c
parent49806fe252030a4cd993f598ff65a89590d57388 (diff)
VCL-LDPRELOAD: add sendfile/sendfile64 implementation.
Change-Id: If0c399269238912456d670432d7e953c9d91b9fb Signed-off-by: Dave Wallace <dwallacelf@gmail.com>
Diffstat (limited to 'src/vcl/vcom_socket.c')
-rw-r--r--src/vcl/vcom_socket.c155
1 files changed, 153 insertions, 2 deletions
diff --git a/src/vcl/vcom_socket.c b/src/vcl/vcom_socket.c
index a84359e8417..6450eddc895 100644
--- a/src/vcl/vcom_socket.c
+++ b/src/vcl/vcom_socket.c
@@ -70,6 +70,7 @@ typedef struct vcom_socket_main_t_
/* Hash table - key:fd, value:vec of epitemidx */
uword *epitemidxs_by_fd;
+ u8 *io_buffer;
} vcom_socket_main_t;
vcom_socket_main_t vcom_socket_main;
@@ -1493,6 +1494,156 @@ vcom_socket_send (int __fd, const void *__buf, size_t __n, int __flags)
return vcom_socket_sendto (__fd, __buf, __n, __flags, NULL, 0);
}
+/* NOTE: this function is not thread safe or 32-bit friendly */
+ssize_t
+vcom_socket_sendfile (int __out_fd, int __in_fd, off_t * __offset,
+ size_t __len)
+{
+ vcom_socket_main_t *vsm = &vcom_socket_main;
+ uword *p;
+ vcom_socket_t *vsock;
+ size_t n_bytes_left = __len;
+ u32 out_sockidx, out_sid = ~0;
+ size_t bytes_to_read;
+ int nbytes;
+ int rv, errno_val;
+ ssize_t results = 0;
+ u8 eagain = 0;
+
+ if (VCOM_DEBUG > 2)
+ clib_warning ("[%d] __out_fd %d, __in_fd %d, __offset %p, __len %lu",
+ getpid (), __out_fd, __in_fd, __offset, __len);
+
+ p = hash_get (vsm->sockidx_by_fd, __out_fd);
+ if (!p)
+ {
+ clib_warning ("[%d] ERROR: invalid __out_fd (%d), fd lookup failed!",
+ getpid (), __len);
+ return -EBADF;
+ }
+ out_sockidx = p[0];
+ vsock = pool_elt_at_index (vsm->vsockets, out_sockidx);
+ if (!vsock)
+ {
+ clib_warning ("[%d] ERROR: invalid __out_fd (%d) / out_sockidx %u, "
+ "missing vsock pool element!",
+ getpid (), __len, out_sockidx);
+ return -ENOTSOCK;
+ }
+ out_sid = vsock->sid;
+ if (vsock->type != SOCKET_TYPE_VPPCOM_BOUND)
+ {
+ clib_warning ("[%d] ERROR: __out_fd (%d), socket (sid %u) "
+ "is not VCL bound!", getpid (), __out_fd, out_sid);
+ return -EINVAL;
+ }
+
+ if (__offset)
+ {
+ off_t offset = lseek (__in_fd, *__offset, SEEK_SET);
+ if (offset == -1)
+ {
+ errno_val = errno;
+ perror ("lseek()");
+ clib_warning ("[%d] ERROR: lseek SEEK_SET failed: "
+ "in_fd %d, offset %p (%ld), rv %ld, errno %d",
+ getpid (), __in_fd, __offset, *__offset, offset,
+ errno_val);
+ return -errno_val;
+ }
+
+ ASSERT (offset == *__offset);
+ }
+
+ do
+ {
+ bytes_to_read = vppcom_session_attr (out_sid,
+ VPPCOM_ATTR_GET_NWRITE, 0, 0);
+ if (VCOM_DEBUG > 2)
+ clib_warning ("[%d] results %ld, n_bytes_left %lu, "
+ "bytes_to_read %lu", getpid (), results,
+ n_bytes_left, bytes_to_read);
+ if (bytes_to_read == 0)
+ {
+ u32 flags, flags_len = sizeof (flags);
+ rv = vppcom_session_attr (out_sid, VPPCOM_ATTR_GET_FLAGS, &flags,
+ &flags_len);
+ ASSERT (rv == VPPCOM_OK);
+
+ if (flags & O_NONBLOCK)
+ {
+ if (!results)
+ {
+ if (VCOM_DEBUG > 2)
+ clib_warning ("[%d] EAGAIN", getpid ());
+ eagain = 1;
+ }
+ goto update_offset;
+ }
+ else
+ continue;
+ }
+ bytes_to_read = clib_min (n_bytes_left, bytes_to_read);
+ vec_validate (vsm->io_buffer, bytes_to_read);
+ nbytes = libc_read (__in_fd, vsm->io_buffer, bytes_to_read);
+ if (nbytes < 0)
+ {
+ errno_val = errno;
+ perror ("read()");
+ clib_warning ("[%d] ERROR: libc_read (__in_fd (%d), "
+ "io_buffer %p, bytes_to_read %lu) returned "
+ "errno %d",
+ getpid (), __in_fd, vsm->io_buffer,
+ bytes_to_read, errno_val);
+ if (results == 0)
+ {
+ vec_reset_length (vsm->io_buffer);
+ return -errno_val;
+ }
+ goto update_offset;
+ }
+ rv = vppcom_session_write (out_sid, vsm->io_buffer, nbytes);
+ if (rv < 0)
+ {
+ clib_warning ("[%d] ERROR: vppcom_session_write ("
+ "out_sid %u, io_buffer %p, nbytes %d) returned %d",
+ getpid (), out_sid, vsm->io_buffer, nbytes, rv);
+ if (results == 0)
+ {
+ vec_reset_length (vsm->io_buffer);
+ return rv;
+ }
+ goto update_offset;
+ }
+
+ results += nbytes;
+ ASSERT (n_bytes_left >= nbytes);
+ n_bytes_left = n_bytes_left - nbytes;
+ }
+ while (n_bytes_left > 0);
+
+update_offset:
+ if (__offset)
+ {
+ off_t offset = lseek (__in_fd, *__offset, SEEK_SET);
+ if (offset == -1)
+ {
+ errno_val = errno;
+ perror ("lseek()");
+ clib_warning ("[%d] ERROR: lseek (__in_fd %d, __offset %p "
+ "(%ld), SEEK_SET) returned errno %d",
+ getpid (), __in_fd, __offset, *__offset, errno_val);
+ vec_reset_length (vsm->io_buffer);
+ return -errno_val;
+ }
+
+ *__offset += results + 1;
+ }
+
+ vec_reset_length (vsm->io_buffer);
+ return eagain ? -EAGAIN : results;
+}
+
ssize_t
vcom_socket_recv (int __fd, void *__buf, size_t __n, int __flags)
{
@@ -2327,7 +2478,7 @@ vcom_socket_accept_flags (int __fd, __SOCKADDR_ARG __addr,
* on the queue, accept () blocks the caller
* until a connection is present.
*/
- rv = vppcom_session_accept (vsock->sid, &ep,
+ rv = vppcom_session_accept (vsock->sid, &ep, flags,
-1.0 /* wait forever */ );
}
else
@@ -2337,7 +2488,7 @@ vcom_socket_accept_flags (int __fd, __SOCKADDR_ARG __addr,
* block.
* */
/* is non blocking */
- rv = vppcom_session_accept (vsock->sid, &ep, 0);
+ rv = vppcom_session_accept (vsock->sid, &ep, flags, 0);
/* If the socket is marked nonblocking and
* no pending connections are present on the
* queue, accept fails with the error