gfapi: preserve glfd state during glfs_dup

Following patch introduced a new state variable in glfd
to track the current status of the fd.
http://review.gluster.org/13340/

But this state was not copied in glfd_dup function.

Backport of commit 5bdfaf98904a339144bf3a237b162e8385b95085:
> BUG: 1311146
> Change-Id: I283f8944035f6defe491f81e13d7ef28fc440572
> Signed-off-by: Rajesh Joseph <rjoseph@redhat.com>
> Reviewed-on: http://review.gluster.org/13666
> Smoke: Gluster Build System <jenkins@build.gluster.com>
> Reviewed-by: Prashanth Pai <ppai@redhat.com>
> Tested-by: Prashanth Pai <ppai@redhat.com>
> NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
> CentOS-regression: Gluster Build System <jenkins@build.gluster.com>
> Reviewed-by: Raghavendra Talur <rtalur@redhat.com>
> Reviewed-by: Niels de Vos <ndevos@redhat.com>

Change-Id: I283f8944035f6defe491f81e13d7ef28fc440572
BUG: 1317863
Signed-off-by: Rajesh Joseph <rjoseph@redhat.com>
Reviewed-on: http://review.gluster.org/13742
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Niels de Vos <ndevos@redhat.com>
Smoke: Gluster Build System <jenkins@build.gluster.com>

3 files changed, 110 insertions, 0 deletions

diff --git a/api/src/glfs-fops.c b/api/src/glfs-fops.c
index fdffc7b7cb3..490e2b579bb 100644
--- a/api/src/glfs-fops.c
+++ b/api/src/glfs-fops.c
@@ -3988,6 +3988,7 @@ pub_glfs_dup (struct glfs_fd *glfd)
 	}
 
 	dupfd->fd = fd_ref (fd);
+        dupfd->state = glfd->state;
 out:
 	if (fd)
 		fd_unref (fd);
diff --git a/tests/basic/gfapi/gfapi-dup.c b/tests/basic/gfapi/gfapi-dup.c
new file mode 100644
index 00000000000..450fbdc4186
--- /dev/null
+++ b/tests/basic/gfapi/gfapi-dup.c
@@ -0,0 +1,82 @@
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <glusterfs/api/glfs.h>
+#include <glusterfs/api/glfs-handles.h>
+
+#define VALIDATE_AND_GOTO_LABEL_ON_ERROR(func, ret, label) do { \
+        if (ret < 0) {            \
+                fprintf (stderr, "%s : returned error %d (%s)\n", \
+                         func, ret, strerror (errno)); \
+                goto label; \
+        } \
+        } while (0)
+
+int
+main (int argc, char *argv[])
+{
+        int             ret = -1;
+        int             flags = O_RDWR|O_SYNC;
+        glfs_t         *fs = NULL;
+        glfs_fd_t      *fd1 = NULL;
+        glfs_fd_t      *fd2 = NULL;
+        char           *volname = NULL;
+        char           *logfile = NULL;
+        const char     *filename = "file_tmp";
+        const char     *buff = "An opinion should be the result of thought, "
+                                "not a substitute for it.";
+
+        if (argc != 3) {
+                fprintf (stderr, "Invalid argument\n");
+                return 1;
+        }
+
+        volname = argv[1];
+        logfile = argv[2];
+
+        fs = glfs_new (volname);
+        if (!fs)
+                VALIDATE_AND_GOTO_LABEL_ON_ERROR ("glfs_new", ret, out);
+
+        ret = glfs_set_volfile_server (fs, "tcp", "localhost", 24007);
+        VALIDATE_AND_GOTO_LABEL_ON_ERROR ("glfs_set_volfile_server", ret, out);
+
+        ret = glfs_set_logging (fs, logfile, 7);
+        VALIDATE_AND_GOTO_LABEL_ON_ERROR ("glfs_set_logging", ret, out);
+
+        ret = glfs_init (fs);
+        VALIDATE_AND_GOTO_LABEL_ON_ERROR ("glfs_init", ret, out);
+
+        fd1 = glfs_creat(fs, filename, flags, 0644);
+        if (fd1 == NULL) {
+                ret = -1;
+                VALIDATE_AND_GOTO_LABEL_ON_ERROR ("glfs_creat", ret, out);
+        }
+
+        ret = glfs_write (fd1, buff, strlen (buff), flags);
+        VALIDATE_AND_GOTO_LABEL_ON_ERROR ("glfs_write", ret, out);
+
+        fd2 = glfs_dup(fd1);
+        if (fd2 == NULL) {
+                ret = -1;
+                VALIDATE_AND_GOTO_LABEL_ON_ERROR ("glfs_dup", ret, out);
+        }
+
+        ret = glfs_lseek (fd2, 0, SEEK_SET);
+        VALIDATE_AND_GOTO_LABEL_ON_ERROR ("glfs_lseek", ret, out);
+
+out:
+        if (fd1 != NULL)
+                glfs_close(fd1);
+        if (fd2 != NULL)
+                glfs_close(fd2);
+        if (fs) {
+                ret = glfs_fini(fs);
+                if (ret)
+                        fprintf (stderr, "glfs_fini(fs) returned %d\n", ret);
+        }
+
+        return ret;
+}
+
+
diff --git a/tests/basic/gfapi/gfapi-dup.sh b/tests/basic/gfapi/gfapi-dup.sh
new file mode 100755
index 00000000000..6c89e0e473d
--- /dev/null
+++ b/tests/basic/gfapi/gfapi-dup.sh
@@ -0,0 +1,27 @@
+#!/bin/bash
+
+. $(dirname $0)/../../include.rc
+. $(dirname $0)/../../volume.rc
+
+cleanup;
+
+TEST glusterd
+
+TEST $CLI volume create $V0 localhost:$B0/brick1;
+EXPECT 'Created' volinfo_field $V0 'Status';
+
+TEST $CLI volume start $V0;
+EXPECT 'Started' volinfo_field $V0 'Status';
+
+logdir=`gluster --print-logdir`
+
+build_tester $(dirname $0)/gfapi-dup.c -lgfapi -o $(dirname $0)/gfapi-dup
+
+TEST ./$(dirname $0)/gfapi-dup $V0  $logdir/gfapi-dup.log
+
+cleanup_tester $(dirname $0)/gfapi-dup
+
+TEST $CLI volume stop $V0
+TEST $CLI volume delete $V0
+
+cleanup;