bybrooklyn/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-04-18 14:53:58 -04:00
Code Issues Packages Projects Releases Wiki Activity

vfio: selftests: Move helper to get cdev path to libvfio

Browse Source 
Move the helper function to get the VFIO cdev path to libvfio so that it
can be used in libvfio in a subsequent commit.

No functional change intended.

Acked-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: David Matlack <dmatlack@google.com>
Link: https://lore.kernel.org/r/20250822212518.4156428-24-dmatlack@google.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
David Matlack
2025-08-22 21:25:10 +00:00
committed by Alex Williamson
parent 35b05bd962
commit 118e073ef6
3 changed files with 34 additions and 32 deletions
Download Patch File Download Diff File Expand all files Collapse all files

31
tools/testing/selftests/vfio/lib/vfio_pci_device.c
View File

@@ -1,4 +1,5 @@
// SPDX-License-Identifier: GPL-2.0-only
#include <dirent.h>
#include <fcntl.h>
#include <libgen.h>
#include <stdlib.h>
@@ -332,6 +333,36 @@ static void vfio_pci_device_setup(struct vfio_pci_device *device, const char *bd
device->msi_eventfds[i] = -1;
}
const char *vfio_pci_get_cdev_path(const char *bdf)
{
char dir_path[PATH_MAX];
struct dirent *entry;
char *cdev_path;
DIR *dir;
cdev_path = calloc(PATH_MAX, 1);
VFIO_ASSERT_NOT_NULL(cdev_path);
snprintf(dir_path, sizeof(dir_path), "/sys/bus/pci/devices/%s/vfio-dev/", bdf);
dir = opendir(dir_path);
VFIO_ASSERT_NOT_NULL(dir, "Failed to open directory %s\n", dir_path);
while ((entry = readdir(dir)) != NULL) {
/* Find the file that starts with "vfio" */
if (strncmp("vfio", entry->d_name, 4))
continue;
snprintf(cdev_path, PATH_MAX, "/dev/vfio/devices/%s", entry->d_name);
break;
}
VFIO_ASSERT_NE(cdev_path[0], 0, "Failed to find vfio cdev file.\n");
VFIO_ASSERT_EQ(closedir(dir), 0);
return cdev_path;
}
struct vfio_pci_device *vfio_pci_device_init(const char *bdf, int iommu_type)
{
struct vfio_pci_device *device;