[PATCH 7/7] librdmacm/rspreload: Add fstat support

vsftpd calls fstat on a socket.  Fake it out.

Signed-off-by: Sean Hefty <sean.hefty@...>
---
 src/preload.c |   17 +++++++++++++++++
 1 files changed, 17 insertions(+), 0 deletions(-)

diff --git a/src/preload.c b/src/preload.c
index c6cf176..8f19af5 100644
--- a/src/preload.c
+++ b/src/preload.c
 <at>  <at>  -87,6 +87,7  <at>  <at>  struct socket_calls {
 	int (*fcntl)(int socket, int cmd, ... /* arg */);
 	int (*dup2)(int oldfd, int newfd);
 	ssize_t (*sendfile)(int out_fd, int in_fd, off_t *offset, size_t count);
+	int (*fxstat)(int ver, int fd, struct stat *buf);
 };

 static struct socket_calls real;
 <at>  <at>  -280,6 +281,7  <at>  <at>  static void init_preload(void)
 	real.fcntl = dlsym(RTLD_NEXT, "fcntl");
 	real.dup2 = dlsym(RTLD_NEXT, "dup2");
 	real.sendfile = dlsym(RTLD_NEXT, "sendfile");
+	real.fxstat = dlsym(RTLD_NEXT, "__fxstat");

 	rs.socket = dlsym(RTLD_DEFAULT, "rsocket");
 	rs.bind = dlsym(RTLD_DEFAULT, "rbind");
 <at>  <at>  -1033,3 +1035,18  <at>  <at>  ssize_t sendfile(int out_fd, int in_fd, off_t *offset, size_t count)
 	munmap(file_addr, count);
 	return ret;