support for debug prints

diff --git a/src/preload.c b/src/preload.c
index 33eb9a329f0940320a81b1cdf07c86fc93944e69..4ebcc8583845fad17debe46ec935e53d796e31fc 100644 (file)
--- a/src/preload.c
+++ b/src/preload.c
@@ -48,6 +48,7 @@
 #include <netinet/tcp.h>
 #include <unistd.h>
 #include <semaphore.h>
+#include <stdio.h>
 
 #include <rdma/rdma_cma.h>
 #include <rdma/rdma_verbs.h>
@@ -84,7 +85,7 @@ struct socket_calls {
                          void *optval, socklen_t *optlen);
        int (*fcntl)(int socket, int cmd, ... /* arg */);
        int (*dup2)(int oldfd, int newfd);
-       int (*fstat)(int fd, struct stat *buf);
+       int (*fxstat64)(int ver, int fd, struct stat64 *buf);
 };
 
 static struct socket_calls real;
@@ -98,6 +99,8 @@ static int rq_size;
 static int sq_inline;
 static int fork_support;
 
+static FILE *fout;
+
 enum fd_type {
        fd_normal,
        fd_rsocket,
@@ -260,7 +263,7 @@ static void init_preload(void)
        real.getsockopt = dlsym(RTLD_NEXT, "getsockopt");
        real.fcntl = dlsym(RTLD_NEXT, "fcntl");
        real.dup2 = dlsym(RTLD_NEXT, "dup2");
-       real.fstat = dlsym(RTLD_NEXT, "fstat");
+       real.fxstat64 = dlsym(RTLD_NEXT, "__fxstat64");
 
        rs.socket = dlsym(RTLD_DEFAULT, "rsocket");
        rs.bind = dlsym(RTLD_DEFAULT, "rbind");
@@ -286,6 +289,7 @@ static void init_preload(void)
        rs.getsockopt = dlsym(RTLD_DEFAULT, "rgetsockopt");
        rs.fcntl = dlsym(RTLD_DEFAULT, "rfcntl");
 
+       fout = fopen("rs-out.txt", "w+");
        getenv_options();
        init = 1;
 out:
@@ -964,16 +968,21 @@ int dup2(int oldfd, int newfd)
        return newfd;
 }
 
-int fstat(int socket, struct stat *buf)
+int __fxstat64(int ver, int socket, struct stat64 *buf)
 {
        int fd, ret;
 
+       init_preload();
+       fprintf(fout, "fxstat64 socket %d\n", socket);
        if (fd_get(socket, &fd) == fd_rsocket) {
-               ret = real.fstat(socket, buf);
+               ret = real.fxstat64(ver, socket, buf);
+               fprintf(fout, "fxstat64 - rsocket %d\n", ret);
                if (!ret)
                        buf->st_mode = (buf->st_mode & ~S_IFMT) | __S_IFSOCK;
        } else {
-               ret = real.fstat(fd, buf);
+               ret = real.fxstat64(ver, fd, buf);
+               fprintf(fout, "fxstat64 - normal %d\n", ret);
        }
+       fflush(fout);
        return ret;
 }