[dpdk-stable] patch 'vfio: export functions even when disabled' has been queued to stable release 18.02.2

[luca.boccassi at gmail.com]

Hi,

FYI, your patch has been queued to stable release 18.02.2

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 05/02/18. So please
shout if anyone has objections.

Thanks.

Luca Boccassi

---
>From 6d0f8aefc7c177a0d64107f5c3e8d2a713d09e5b Mon Sep 17 00:00:00 2001
From: Anatoly Burakov <anatoly.burakov at intel.com>
Date: Mon, 16 Apr 2018 13:13:56 +0100
Subject: [PATCH] vfio: export functions even when disabled

[ upstream commit 6e8a721044c6ef677e67991f3f2a9bd0870eecc2 ]

Previously, VFIO functions were not compiled in and exported if
VFIO compilation was disabled. Fix this by actually compiling
all of the functions unconditionally, and provide missing
prototypes on Linux.

Fixes: 279b581c897d ("vfio: expose functions")
Fixes: 73a639085938 ("vfio: allow to map other memory regions")
Fixes: 964b2f3bfb07 ("vfio: export some internal functions")

Signed-off-by: Anatoly Burakov <anatoly.burakov at intel.com>
---
 lib/librte_eal/bsdapp/eal/eal.c          | 13 +------
 lib/librte_eal/common/include/rte_vfio.h | 15 +++++---
 lib/librte_eal/linuxapp/eal/eal_vfio.c   | 64 +++++++++++++++++++++++++++++++-
 3 files changed, 74 insertions(+), 18 deletions(-)

diff --git a/lib/librte_eal/bsdapp/eal/eal.c b/lib/librte_eal/bsdapp/eal/eal.c
index 4eafcb5ad..b1b8f7600 100644
--- a/lib/librte_eal/bsdapp/eal/eal.c
+++ b/lib/librte_eal/bsdapp/eal/eal.c
@@ -40,6 +40,7 @@
 #include <rte_dev.h>
 #include <rte_devargs.h>
 #include <rte_version.h>
+#include <rte_vfio.h>
 #include <rte_atomic.h>
 #include <malloc_heap.h>
 
@@ -735,18 +736,6 @@ rte_eal_vfio_intr_mode(void)
 	return RTE_INTR_MODE_NONE;
 }
 
-/* dummy forward declaration. */
-struct vfio_device_info;
-
-/* dummy prototypes. */
-int rte_vfio_setup_device(const char *sysfs_base, const char *dev_addr,
-		int *vfio_dev_fd, struct vfio_device_info *device_info);
-int rte_vfio_release_device(const char *sysfs_base, const char *dev_addr, int fd);
-int rte_vfio_enable(const char *modname);
-int rte_vfio_is_enabled(const char *modname);
-int rte_vfio_noiommu_is_enabled(void);
-int rte_vfio_clear_group(int vfio_group_fd);
-
 int rte_vfio_setup_device(__rte_unused const char *sysfs_base,
 		      __rte_unused const char *dev_addr,
 		      __rte_unused int *vfio_dev_fd,
diff --git a/lib/librte_eal/common/include/rte_vfio.h b/lib/librte_eal/common/include/rte_vfio.h
index 249095e46..c98ba48dc 100644
--- a/lib/librte_eal/common/include/rte_vfio.h
+++ b/lib/librte_eal/common/include/rte_vfio.h
@@ -5,6 +5,10 @@
 #ifndef _RTE_VFIO_H_
 #define _RTE_VFIO_H_
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /*
  * determine if VFIO is present on the system
  */
@@ -28,9 +32,12 @@
 #define VFIO_NOIOMMU_MODE      \
 	"/sys/module/vfio/parameters/enable_unsafe_noiommu_mode"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+#else /* not VFIO_PRESENT */
+
+/* we don't need an actual definition, only pointer is used */
+struct vfio_device_info;
+
+#endif /* VFIO_PRESENT */
 
 /**
  * Setup vfio_cfg for the device identified by its address.
@@ -131,6 +138,4 @@ rte_vfio_clear_group(int vfio_group_fd);
 }
 #endif
 
-#endif /* VFIO_PRESENT */
-
 #endif /* _RTE_VFIO_H_ */
diff --git a/lib/librte_eal/linuxapp/eal/eal_vfio.c b/lib/librte_eal/linuxapp/eal/eal_vfio.c
index 9e593184c..d20ec8d9f 100644
--- a/lib/librte_eal/linuxapp/eal/eal_vfio.c
+++ b/lib/librte_eal/linuxapp/eal/eal_vfio.c
@@ -838,4 +838,66 @@ rte_vfio_noiommu_is_enabled(void)
 	return c == 'Y';
 }
 
-#endif
+#else
+
+int
+rte_vfio_setup_device(__rte_unused const char *sysfs_base,
+		__rte_unused const char *dev_addr,
+		__rte_unused int *vfio_dev_fd,
+		__rte_unused struct vfio_device_info *device_info)
+{
+	return -1;
+}
+
+int
+rte_vfio_release_device(__rte_unused const char *sysfs_base,
+		__rte_unused const char *dev_addr, __rte_unused int fd)
+{
+	return -1;
+}
+
+int
+rte_vfio_enable(__rte_unused const char *modname)
+{
+	return -1;
+}
+
+int
+rte_vfio_is_enabled(__rte_unused const char *modname)
+{
+	return -1;
+}
+
+int
+rte_vfio_noiommu_is_enabled(void)
+{
+	return -1;
+}
+
+int
+rte_vfio_clear_group(__rte_unused int vfio_group_fd)
+{
+	return -1;
+}
+
+int __rte_experimental
+rte_vfio_get_group_num(__rte_unused const char *sysfs_base,
+		__rte_unused const char *dev_addr,
+		__rte_unused int *iommu_group_num)
+{
+	return -1;
+}
+
+int __rte_experimental
+rte_vfio_get_container_fd(void)
+{
+	return -1;
+}
+
+int __rte_experimental
+rte_vfio_get_group_fd(__rte_unused int iommu_group_num)
+{
+	return -1;
+}
+
+#endif /* VFIO_PRESENT */
-- 
2.14.2