The current virpci code uses the Linux-specific sysfs subsystem, which makes
it impossible to use on other Unix-like systems. The libpciaccess library
provides a cross-platform API for accessing the PCI bus. Employ it to make
the code portable.
This makes libpciaccess a non-optional dependency of libvirt.
Signed-off-by: Alexander Shursha <kekek2(a)ya.ru>
---
meson.build | 11 +-
meson_options.txt | 4 +-
src/meson.build | 1 +
src/util/virpci.c | 465 +++++++++++----------------------------------
tests/virpcimock.c | 22 ++-
5 files changed, 139 insertions(+), 364 deletions(-)
diff --git a/meson.build b/meson.build
index 2d76a0846c..85bd882406 100644
--- a/meson.build
+++ b/meson.build
@@ -1207,7 +1207,10 @@ parallels_sdk_version = '7.0.22'
parallels_sdk_dep = dependency('parallels-sdk', version: '>=' + parallels_sdk_version, required: false)
pciaccess_version = '0.10.0'
-pciaccess_dep = dependency('pciaccess', version: '>=' + pciaccess_version, required: get_option('pciaccess'))
+pciaccess_dep = dependency('pciaccess', version: '>=' + pciaccess_version)
+if not pciaccess_dep.found()
+ error('pciaccess is required to build libvirt')
+endif
rbd_dep = cc.find_library('rbd', required: get_option('storage_rbd'))
rados_dep = cc.find_library('rados', required: get_option('storage_rbd'))
@@ -1461,11 +1464,6 @@ if not get_option('polkit').disabled()
endif
endif
-if udev_dep.found() and not pciaccess_dep.found()
- error('You must install the pciaccess module to build with udev')
-endif
-
-
# build driver options
remote_default_mode = get_option('remote_default_mode')
@@ -2341,7 +2339,6 @@ libs_summary = {
'numactl': numactl_dep.found(),
'openwsman': openwsman_dep.found(),
'parallels-sdk': parallels_sdk_dep.found(),
- 'pciaccess': pciaccess_dep.found(),
'polkit': conf.has('WITH_POLKIT'),
'rbd': rbd_dep.found(),
'readline': readline_dep.found(),
diff --git a/meson_options.txt b/meson_options.txt
index 3dc3e8667b..69605238ba 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -38,7 +38,6 @@ option('netcf', type: 'feature', value: 'auto', description: 'netcf support')
option('nls', type: 'feature', value: 'auto', description: 'nls support')
option('numactl', type: 'feature', value: 'auto', description: 'numactl support')
option('openwsman', type: 'feature', value: 'auto', description: 'openwsman support')
-option('pciaccess', type: 'feature', value: 'auto', description: 'pciaccess support')
option('polkit', type: 'feature', value: 'auto', description: 'use PolicyKit for UNIX socket access checks')
option('readline', type: 'feature', value: 'auto', description: 'readline support')
option('sanlock', type: 'feature', value: 'auto', description: 'sanlock support')
@@ -46,7 +45,6 @@ option('sasl', type: 'feature', value: 'auto', description: 'sasl support')
option('selinux', type: 'feature', value: 'auto', description: 'selinux support')
option('selinux_mount', type: 'string', value: '', description: 'set SELinux mount point')
option('sshconfdir', type: 'string', value: '', description: 'directory for SSH client configuration')
-# dep:pciaccess
option('udev', type: 'feature', value: 'auto', description: 'udev support')
# dep:driver_remote
option('wireshark_dissector', type: 'feature', value: 'auto', description: 'wireshark support')
@@ -59,7 +57,7 @@ option('driver_bhyve', type: 'feature', value: 'auto', description: 'bhyve drive
option('driver_esx', type: 'feature', value: 'auto', description: 'esx driver')
# dep:openwsman
option('driver_hyperv', type: 'feature', value: 'auto', description: 'Hyper-V driver')
-# dep:pciaccess dep:udev dep:driver_remote dep:driver_libvirtd
+# dep:udev dep:driver_remote dep:driver_libvirtd
option('driver_interface', type: 'feature', value: 'auto', description: 'host interface driver')
# dep:driver_remote
option('driver_libvirtd', type: 'feature', value: 'auto', description: 'libvirtd driver')
diff --git a/src/meson.build b/src/meson.build
index 9413192a55..39788ac4d7 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -411,6 +411,7 @@ libvirt_lib = shared_library(
dtrace_gen_objects,
dependencies: [
src_dep,
+ pciaccess_dep
],
link_args: libvirt_link_args,
link_whole: [
diff --git a/src/util/virpci.c b/src/util/virpci.c
index 90617e69c6..b5bbe73ece 100644
--- a/src/util/virpci.c
+++ b/src/util/virpci.c
@@ -2,6 +2,7 @@
* virpci.c: helper APIs for managing host PCI devices
*
* Copyright (C) 2009-2015 Red Hat, Inc.
+ * Copyright (C) 2024-2025 Future Crew, LLC
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
@@ -29,6 +30,7 @@
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
+#include <pciaccess.h>
#ifdef __linux__
# include <sys/utsname.h>
@@ -72,7 +74,7 @@ struct _virPCIDevice {
char *name; /* domain:bus:slot.function */
char id[PCI_ID_LEN]; /* product vendor */
- char *path;
+ struct pci_device *device;
/* The driver:domain which uses the device */
char *used_by_drvname;
@@ -359,121 +361,6 @@ virPCIDeviceGetCurrentDriverNameAndType(virPCIDevice *dev,
}
-static int
-virPCIDeviceConfigOpenInternal(virPCIDevice *dev, bool readonly, bool fatal)
-{
- int fd;
-
- fd = open(dev->path, readonly ? O_RDONLY : O_RDWR);
-
- if (fd < 0) {
- if (fatal) {
- virReportSystemError(errno,
- _("Failed to open config space file '%1$s'"),
- dev->path);
- } else {
- VIR_WARN("Failed to open config space file '%s': %s",
- dev->path, g_strerror(errno));
- }
- return -1;
- }
-
- VIR_DEBUG("%s %s: opened %s", dev->id, dev->name, dev->path);
- return fd;
-}
-
-static int
-virPCIDeviceConfigOpen(virPCIDevice *dev)
-{
- return virPCIDeviceConfigOpenInternal(dev, true, true);
-}
-
-static int
-virPCIDeviceConfigOpenTry(virPCIDevice *dev)
-{
- return virPCIDeviceConfigOpenInternal(dev, true, false);
-}
-
-static int
-virPCIDeviceConfigOpenWrite(virPCIDevice *dev)
-{
- return virPCIDeviceConfigOpenInternal(dev, false, true);
-}
-
-static void
-virPCIDeviceConfigClose(virPCIDevice *dev, int cfgfd)
-{
- if (VIR_CLOSE(cfgfd) < 0) {
- VIR_WARN("Failed to close config space file '%s': %s",
- dev->path, g_strerror(errno));
- }
-}
-
-
-static int
-virPCIDeviceRead(virPCIDevice *dev,
- int cfgfd,
- unsigned int pos,
- uint8_t *buf,
- unsigned int buflen)
-{
- memset(buf, 0, buflen);
- errno = 0;
-
- if (lseek(cfgfd, pos, SEEK_SET) != pos ||
- saferead(cfgfd, buf, buflen) != buflen) {
- VIR_DEBUG("Failed to read %u bytes at %u from '%s' : %s",
- buflen, pos, dev->path, g_strerror(errno));
- return -1;
- }
- return 0;
-}
-
-
-/**
- * virPCIDeviceReadN:
- * @dev: virPCIDevice object (used only to log name of config file)
- * @cfgfd: open file descriptor for device config file in sysfs
- * @pos: byte offset in the file to read from
- *
- * read "N" (where "N" is "8", "16", or "32", and appears at the end
- * of the function name) bytes from a PCI device's already-opened
- * sysfs config file and return them as the return value from the
- * function.
- *
- * Returns the value at @pos in the file, or 0 if there was an
- * error. NB: since 0 could be a valid value, occurrence of an error
- * must be determined by examining errno. errno is always reset to 0
- * before the seek/read is attempted (see virPCIDeviceRead()), so if
- * errno != 0 on return from one of these functions, then either the
- * seek or the read operation failed for some reason. If errno == 0
- * and the return value is 0, then the config file really does contain
- * the value 0 at @pos.
- */
-static uint8_t
-virPCIDeviceRead8(virPCIDevice *dev, int cfgfd, unsigned int pos)
-{
- uint8_t buf;
- virPCIDeviceRead(dev, cfgfd, pos, &buf, sizeof(buf));
- return buf;
-}
-
-static uint16_t
-virPCIDeviceRead16(virPCIDevice *dev, int cfgfd, unsigned int pos)
-{
- uint8_t buf[2];
- virPCIDeviceRead(dev, cfgfd, pos, &buf[0], sizeof(buf));
- return (buf[0] << 0) | (buf[1] << 8);
-}
-
-static uint32_t
-virPCIDeviceRead32(virPCIDevice *dev, int cfgfd, unsigned int pos)
-{
- uint8_t buf[4];
- virPCIDeviceRead(dev, cfgfd, pos, &buf[0], sizeof(buf));
- return (buf[0] << 0) | (buf[1] << 8) | (buf[2] << 16) | (buf[3] << 24);
-}
-
static int
virPCIDeviceReadClass(virPCIDevice *dev, uint16_t *device_class)
{
@@ -499,36 +386,6 @@ virPCIDeviceReadClass(virPCIDevice *dev, uint16_t *device_class)
return 0;
}
-static int
-virPCIDeviceWrite(virPCIDevice *dev,
- int cfgfd,
- unsigned int pos,
- uint8_t *buf,
- unsigned int buflen)
-{
- if (lseek(cfgfd, pos, SEEK_SET) != pos ||
- safewrite(cfgfd, buf, buflen) != buflen) {
- VIR_WARN("Failed to write to '%s' : %s", dev->path,
- g_strerror(errno));
- return -1;
- }
- return 0;
-}
-
-static void
-virPCIDeviceWrite16(virPCIDevice *dev, int cfgfd, unsigned int pos, uint16_t val)
-{
- uint8_t buf[2] = { (val >> 0), (val >> 8) };
- virPCIDeviceWrite(dev, cfgfd, pos, &buf[0], sizeof(buf));
-}
-
-static void
-virPCIDeviceWrite32(virPCIDevice *dev, int cfgfd, unsigned int pos, uint32_t val)
-{
- uint8_t buf[4] = { (val >> 0), (val >> 8), (val >> 16), (val >> 24) };
- virPCIDeviceWrite(dev, cfgfd, pos, &buf[0], sizeof(buf));
-}
-
typedef int (*virPCIDeviceIterPredicate)(virPCIDevice *, virPCIDevice *,
void *);
@@ -610,7 +467,6 @@ virPCIDeviceIterDevices(virPCIDeviceIterPredicate predicate,
*/
static int
virPCIDeviceFindCapabilityOffset(virPCIDevice *dev,
- int cfgfd,
unsigned int capability,
unsigned int *offset)
{
@@ -619,11 +475,13 @@ virPCIDeviceFindCapabilityOffset(virPCIDevice *dev,
*offset = 0; /* assume failure (*nothing* can be at offset 0) */
- status = virPCIDeviceRead16(dev, cfgfd, PCI_STATUS);
+ pci_device_cfg_read_u16(dev->device, &status, PCI_STATUS);
+
if (errno != 0 || !(status & PCI_STATUS_CAP_LIST))
goto error;
- pos = virPCIDeviceRead8(dev, cfgfd, PCI_CAPABILITY_LIST);
+ pci_device_cfg_read_u8(dev->device, &pos, PCI_CAPABILITY_LIST);
+
if (errno != 0)
goto error;
@@ -635,7 +493,9 @@ virPCIDeviceFindCapabilityOffset(virPCIDevice *dev,
* capabilities here.
*/
while (pos >= PCI_CONF_HEADER_LEN && pos != 0xff) {
- uint8_t capid = virPCIDeviceRead8(dev, cfgfd, pos);
+ uint8_t capid;
+ pci_device_cfg_read_u8(dev->device, &capid, pos);
+
if (errno != 0)
goto error;
@@ -646,7 +506,8 @@ virPCIDeviceFindCapabilityOffset(virPCIDevice *dev,
return 0;
}
- pos = virPCIDeviceRead8(dev, cfgfd, pos + 1);
+ pci_device_cfg_read_u8(dev->device, &pos, pos + 1);
+
if (errno != 0)
goto error;
}
@@ -665,7 +526,6 @@ virPCIDeviceFindCapabilityOffset(virPCIDevice *dev,
static unsigned int
virPCIDeviceFindExtendedCapabilityOffset(virPCIDevice *dev,
- int cfgfd,
unsigned int capability)
{
int ttl;
@@ -677,7 +537,7 @@ virPCIDeviceFindExtendedCapabilityOffset(virPCIDevice *dev,
pos = PCI_EXT_CAP_BASE;
while (ttl > 0 && pos >= PCI_EXT_CAP_BASE) {
- header = virPCIDeviceRead32(dev, cfgfd, pos);
+ header = pci_device_cfg_read_u32(dev->device, &header, pos);
if ((header & PCI_EXT_CAP_ID_MASK) == capability)
return pos;
@@ -693,7 +553,7 @@ virPCIDeviceFindExtendedCapabilityOffset(virPCIDevice *dev,
* not have FLR, 1 if it does, and -1 on error
*/
static bool
-virPCIDeviceDetectFunctionLevelReset(virPCIDevice *dev, int cfgfd)
+virPCIDeviceDetectFunctionLevelReset(virPCIDevice *dev)
{
uint32_t caps;
unsigned int pos;
@@ -707,7 +567,7 @@ virPCIDeviceDetectFunctionLevelReset(virPCIDevice *dev, int cfgfd)
* on SR-IOV NICs at the moment.
*/
if (dev->pcie_cap_pos) {
- caps = virPCIDeviceRead32(dev, cfgfd, dev->pcie_cap_pos + PCI_EXP_DEVCAP);
+ pci_device_cfg_read_u32(dev->device, &caps, dev->pcie_cap_pos + PCI_EXP_DEVCAP);
if (caps & PCI_EXP_DEVCAP_FLR) {
VIR_DEBUG("%s %s: detected PCIe FLR capability", dev->id, dev->name);
return true;
@@ -718,11 +578,13 @@ virPCIDeviceDetectFunctionLevelReset(virPCIDevice *dev, int cfgfd)
* the same thing, except for conventional PCI
* devices. This is not common yet.
*/
- if (virPCIDeviceFindCapabilityOffset(dev, cfgfd, PCI_CAP_ID_AF, &pos) < 0)
+ if (virPCIDeviceFindCapabilityOffset(dev, PCI_CAP_ID_AF, &pos) < 0)
goto error;
if (pos) {
- caps = virPCIDeviceRead16(dev, cfgfd, pos + PCI_AF_CAP);
+ uint16_t caps16;
+ pci_device_cfg_read_u16(dev->device, &caps16, pos + PCI_AF_CAP);
+ caps = caps16;
if (caps & PCI_AF_CAP_FLR) {
VIR_DEBUG("%s %s: detected PCI FLR capability", dev->id, dev->name);
return true;
@@ -754,13 +616,13 @@ virPCIDeviceDetectFunctionLevelReset(virPCIDevice *dev, int cfgfd)
* internal reset, not just a soft reset.
*/
static bool
-virPCIDeviceDetectPowerManagementReset(virPCIDevice *dev, int cfgfd)
+virPCIDeviceDetectPowerManagementReset(virPCIDevice *dev)
{
if (dev->pci_pm_cap_pos) {
uint32_t ctl;
/* require the NO_SOFT_RESET bit is clear */
- ctl = virPCIDeviceRead32(dev, cfgfd, dev->pci_pm_cap_pos + PCI_PM_CTRL);
+ pci_device_cfg_read_u32(dev->device, &ctl, dev->pci_pm_cap_pos + PCI_PM_CTRL);
if (!(ctl & PCI_PM_CTRL_NO_SOFT_RESET)) {
VIR_DEBUG("%s %s: detected PM reset capability", dev->id, dev->name);
return true;
@@ -811,26 +673,22 @@ virPCIDeviceIsParent(virPCIDevice *dev, virPCIDevice *check, void *data)
uint8_t header_type, secondary, subordinate;
virPCIDevice **best = data;
int ret = 0;
- int fd;
if (dev->address.domain != check->address.domain)
return 0;
- if ((fd = virPCIDeviceConfigOpenTry(check)) < 0)
- return 0;
-
/* Is it a bridge? */
ret = virPCIDeviceReadClass(check, &device_class);
if (ret < 0 || device_class != PCI_CLASS_BRIDGE_PCI)
- goto cleanup;
+ return ret;
/* Is it a plane? */
- header_type = virPCIDeviceRead8(check, fd, PCI_HEADER_TYPE);
+ pci_device_cfg_read_u8(check->device, &header_type, PCI_HEADER_TYPE);
if ((header_type & PCI_HEADER_TYPE_MASK) != PCI_HEADER_TYPE_BRIDGE)
- goto cleanup;
+ return ret;
- secondary = virPCIDeviceRead8(check, fd, PCI_SECONDARY_BUS);
- subordinate = virPCIDeviceRead8(check, fd, PCI_SUBORDINATE_BUS);
+ pci_device_cfg_read_u8(check->device, &secondary, PCI_SECONDARY_BUS);
+ pci_device_cfg_read_u8(check->device, &subordinate, PCI_SUBORDINATE_BUS);
VIR_DEBUG("%s %s: found parent device %s", dev->id, dev->name, check->name);
@@ -838,8 +696,7 @@ virPCIDeviceIsParent(virPCIDevice *dev, virPCIDevice *check, void *data)
* the direct parent. No further work is necessary
*/
if (dev->address.bus == secondary) {
- ret = 1;
- goto cleanup;
+ return 1;
}
/* otherwise, SRIOV allows VFs to be on different buses than their PFs.
@@ -850,35 +707,26 @@ virPCIDeviceIsParent(virPCIDevice *dev, virPCIDevice *check, void *data)
if (*best == NULL) {
*best = virPCIDeviceNew(&check->address);
if (*best == NULL) {
- ret = -1;
- goto cleanup;
+ return -1;
}
} else {
/* OK, we had already recorded a previous "best" match for the
* parent. See if the current device is more restrictive than the
* best, and if so, make it the new best
*/
- int bestfd;
uint8_t best_secondary;
- if ((bestfd = virPCIDeviceConfigOpenTry(*best)) < 0)
- goto cleanup;
- best_secondary = virPCIDeviceRead8(*best, bestfd, PCI_SECONDARY_BUS);
- virPCIDeviceConfigClose(*best, bestfd);
+ pci_device_cfg_read_u8((*best)->device, &best_secondary, PCI_SECONDARY_BUS);
if (secondary > best_secondary) {
virPCIDeviceFree(*best);
*best = virPCIDeviceNew(&check->address);
if (*best == NULL) {
- ret = -1;
- goto cleanup;
+ return -1;
}
}
}
}
-
- cleanup:
- virPCIDeviceConfigClose(check, fd);
return ret;
}
@@ -902,15 +750,14 @@ virPCIDeviceGetParent(virPCIDevice *dev, virPCIDevice **parent)
*/
static int
virPCIDeviceTrySecondaryBusReset(virPCIDevice *dev,
- int cfgfd,
virPCIDeviceList *inactiveDevs)
{
g_autoptr(virPCIDevice) parent = NULL;
g_autoptr(virPCIDevice) conflict = NULL;
uint8_t config_space[PCI_CONF_LEN];
uint16_t ctl;
- int ret = -1;
- int parentfd;
+ pciaddr_t bytes_read;
+ pciaddr_t bytes_written;
/* Refuse to do a secondary bus reset if there are other
* devices/functions behind the bus are used by the host
@@ -932,8 +779,6 @@ virPCIDeviceTrySecondaryBusReset(virPCIDevice *dev,
dev->name);
return -1;
}
- if ((parentfd = virPCIDeviceConfigOpenWrite(parent)) < 0)
- goto out;
VIR_DEBUG("%s %s: doing a secondary bus reset", dev->id, dev->name);
@@ -941,38 +786,37 @@ virPCIDeviceTrySecondaryBusReset(virPCIDevice *dev,
* for the supplied device since we refuse to do a reset if there
* are multiple devices/functions
*/
- if (virPCIDeviceRead(dev, cfgfd, 0, config_space, PCI_CONF_LEN) < 0) {
+ pci_device_cfg_read(dev->device, config_space, 0, PCI_CONF_LEN, &bytes_read);
+ if (bytes_read < PCI_CONF_LEN) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Failed to read PCI config space for %1$s"),
dev->name);
- goto out;
+ return -1;
}
/* Read the control register, set the reset flag, wait 200ms,
* unset the reset flag and wait 200ms.
*/
- ctl = virPCIDeviceRead16(dev, parentfd, PCI_BRIDGE_CONTROL);
- virPCIDeviceWrite16(parent, parentfd, PCI_BRIDGE_CONTROL,
- ctl | PCI_BRIDGE_CTL_RESET);
+ pci_device_cfg_read_u16(parent->device, &ctl, PCI_BRIDGE_CONTROL);
+
+ pci_device_cfg_write_u16(parent->device, ctl | PCI_BRIDGE_CTL_RESET, PCI_BRIDGE_CONTROL);
g_usleep(200 * 1000); /* sleep 200ms */
- virPCIDeviceWrite16(parent, parentfd, PCI_BRIDGE_CONTROL, ctl);
+ pci_device_cfg_write_u16(parent->device, ctl, PCI_BRIDGE_CONTROL);
g_usleep(200 * 1000); /* sleep 200ms */
- if (virPCIDeviceWrite(dev, cfgfd, 0, config_space, PCI_CONF_LEN) < 0) {
+ pci_device_cfg_write(dev->device, config_space, 0, PCI_CONF_LEN, &bytes_written);
+ if (bytes_written < PCI_CONF_LEN) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Failed to restore PCI config space for %1$s"),
dev->name);
- goto out;
+ return -1;
}
- ret = 0;
- out:
- virPCIDeviceConfigClose(parent, parentfd);
- return ret;
+ return 0;
}
/* Power management reset attempts to reset a device using a
@@ -980,16 +824,19 @@ virPCIDeviceTrySecondaryBusReset(virPCIDevice *dev,
* above we require the device supports a full internal reset.
*/
static int
-virPCIDeviceTryPowerManagementReset(virPCIDevice *dev, int cfgfd)
+virPCIDeviceTryPowerManagementReset(virPCIDevice *dev)
{
uint8_t config_space[PCI_CONF_LEN];
uint32_t ctl;
+ pciaddr_t bytes_read;
+ pciaddr_t bytes_written;
if (!dev->pci_pm_cap_pos)
return -1;
/* Save and restore the device's config space. */
- if (virPCIDeviceRead(dev, cfgfd, 0, &config_space[0], PCI_CONF_LEN) < 0) {
+ pci_device_cfg_read(dev->device, config_space, 0, PCI_CONF_LEN, &bytes_read);
+ if (bytes_read < PCI_CONF_LEN) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Failed to read PCI config space for %1$s"),
dev->name);
@@ -998,20 +845,19 @@ virPCIDeviceTryPowerManagementReset(virPCIDevice *dev, int cfgfd)
VIR_DEBUG("%s %s: doing a power management reset", dev->id, dev->name);
- ctl = virPCIDeviceRead32(dev, cfgfd, dev->pci_pm_cap_pos + PCI_PM_CTRL);
+ pci_device_cfg_read_u32(dev->device, &ctl, dev->pci_pm_cap_pos + PCI_PM_CTRL);
ctl &= ~PCI_PM_CTRL_STATE_MASK;
- virPCIDeviceWrite32(dev, cfgfd, dev->pci_pm_cap_pos + PCI_PM_CTRL,
- ctl | PCI_PM_CTRL_STATE_D3hot);
+ pci_device_cfg_write_u32(dev->device, ctl | PCI_PM_CTRL_STATE_D3hot, dev->pci_pm_cap_pos + PCI_PM_CTRL);
g_usleep(10 * 1000); /* sleep 10ms */
- virPCIDeviceWrite32(dev, cfgfd, dev->pci_pm_cap_pos + PCI_PM_CTRL,
- ctl | PCI_PM_CTRL_STATE_D0);
+ pci_device_cfg_write_u32(dev->device, ctl | PCI_PM_CTRL_STATE_D0, dev->pci_pm_cap_pos + PCI_PM_CTRL);
g_usleep(10 * 1000); /* sleep 10ms */
- if (virPCIDeviceWrite(dev, cfgfd, 0, &config_space[0], PCI_CONF_LEN) < 0) {
+ pci_device_cfg_write(dev->device, config_space, 0, PCI_CONF_LEN, &bytes_written);
+ if (bytes_written < PCI_CONF_LEN) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Failed to restore PCI config space for %1$s"),
dev->name);
@@ -1046,10 +892,10 @@ virPCIDeviceTryPowerManagementReset(virPCIDevice *dev, int cfgfd)
* Always returns success (0) (for now)
*/
static int
-virPCIDeviceInit(virPCIDevice *dev, int cfgfd)
+virPCIDeviceInit(virPCIDevice *dev)
{
dev->is_pcie = false;
- if (virPCIDeviceFindCapabilityOffset(dev, cfgfd, PCI_CAP_ID_EXP, &dev->pcie_cap_pos) < 0) {
+ if (virPCIDeviceFindCapabilityOffset(dev, PCI_CAP_ID_EXP, &dev->pcie_cap_pos) < 0) {
/* an unprivileged process is unable to read *all* of a
* device's PCI config (it can only read the first 64
* bytes, which isn't enough for see the Express
@@ -1065,18 +911,13 @@ virPCIDeviceInit(virPCIDevice *dev, int cfgfd)
* -1), then we blindly assume the most likely outcome -
* PCIe.
*/
- off_t configLen = virFileLength(virPCIDeviceGetConfigPath(dev), -1);
-
- if (configLen != 256)
- dev->is_pcie = true;
-
} else {
dev->is_pcie = (dev->pcie_cap_pos != 0);
}
- virPCIDeviceFindCapabilityOffset(dev, cfgfd, PCI_CAP_ID_PM, &dev->pci_pm_cap_pos);
- dev->has_flr = virPCIDeviceDetectFunctionLevelReset(dev, cfgfd);
- dev->has_pm_reset = virPCIDeviceDetectPowerManagementReset(dev, cfgfd);
+ virPCIDeviceFindCapabilityOffset(dev, PCI_CAP_ID_PM, &dev->pci_pm_cap_pos);
+ dev->has_flr = virPCIDeviceDetectFunctionLevelReset(dev);
+ dev->has_pm_reset = virPCIDeviceDetectPowerManagementReset(dev);
return 0;
}
@@ -1089,7 +930,6 @@ virPCIDeviceReset(virPCIDevice *dev,
g_autofree char *drvName = NULL;
virPCIStubDriver drvType;
int ret = -1;
- int fd = -1;
int hdrType = -1;
if (virPCIGetHeaderType(dev, &hdrType) < 0)
@@ -1114,29 +954,26 @@ virPCIDeviceReset(virPCIDevice *dev,
* be redundant.
*/
if (virPCIDeviceGetCurrentDriverNameAndType(dev, &drvName, &drvType) < 0)
- goto cleanup;
+ return -1;
if (drvType == VIR_PCI_STUB_DRIVER_VFIO) {
VIR_DEBUG("Device %s is bound to %s - skip reset", dev->name, drvName);
ret = 0;
- goto cleanup;
+ return 0;
}
VIR_DEBUG("Resetting device %s", dev->name);
- if ((fd = virPCIDeviceConfigOpenWrite(dev)) < 0)
- goto cleanup;
-
- if (virPCIDeviceInit(dev, fd) < 0)
- goto cleanup;
+ if (virPCIDeviceInit(dev) < 0)
+ return -1;
/* KVM will perform FLR when starting and stopping
* a guest, so there is no need for us to do it here.
*/
if (dev->has_flr) {
ret = 0;
- goto cleanup;
+ return 0;
}
/* If the device supports PCI power management reset,
@@ -1144,11 +981,11 @@ virPCIDeviceReset(virPCIDevice *dev,
* the function, not the whole device.
*/
if (dev->has_pm_reset)
- ret = virPCIDeviceTryPowerManagementReset(dev, fd);
+ ret = virPCIDeviceTryPowerManagementReset(dev);
/* Bus reset is not an option with the root bus */
if (ret < 0 && dev->address.bus != 0)
- ret = virPCIDeviceTrySecondaryBusReset(dev, fd, inactiveDevs);
+ ret = virPCIDeviceTrySecondaryBusReset(dev, inactiveDevs);
if (ret < 0) {
virErrorPtr err = virGetLastError();
@@ -1159,8 +996,6 @@ virPCIDeviceReset(virPCIDevice *dev,
_("no FLR, PM reset or bus reset available"));
}
- cleanup:
- virPCIDeviceConfigClose(dev, fd);
return ret;
}
@@ -1756,28 +1591,6 @@ virPCIDeviceReattach(virPCIDevice *dev,
return 0;
}
-static char *
-virPCIDeviceReadID(virPCIDevice *dev, const char *id_name)
-{
- g_autofree char *path = NULL;
- g_autofree char *id_str = NULL;
-
- path = virPCIFile(dev->name, id_name);
-
- /* ID string is '0xNNNN\n' ... i.e. 7 bytes */
- if (virFileReadAll(path, 7, &id_str) < 0)
- return NULL;
-
- /* Check for 0x suffix */
- if (id_str[0] != '0' || id_str[1] != 'x')
- return NULL;
-
- /* Chop off the newline; we know the string is 7 bytes */
- id_str[6] = '\0';
-
- return g_steal_pointer(&id_str);
-}
-
bool
virPCIDeviceAddressIsValid(virPCIDeviceAddress *addr,
bool report)
@@ -1865,9 +1678,9 @@ virPCIDeviceExists(const virPCIDeviceAddress *addr)
virPCIDevice *
virPCIDeviceNew(const virPCIDeviceAddress *address)
{
+ struct pci_device * device;
+
g_autoptr(virPCIDevice) dev = NULL;
- g_autofree char *vendor = NULL;
- g_autofree char *product = NULL;
dev = g_new0(virPCIDevice, 1);
@@ -1875,31 +1688,21 @@ virPCIDeviceNew(const virPCIDeviceAddress *address)
dev->name = virPCIDeviceAddressAsString(&dev->address);
- dev->path = g_strdup_printf(PCI_SYSFS "devices/%s/config", dev->name);
-
- if (!virFileExists(dev->path)) {
- virReportSystemError(errno,
- _("Device %1$s not found: could not access %2$s"),
- dev->name, dev->path);
+ pci_system_init();
+ device = pci_device_find_by_slot(address->domain, address->bus, address->slot, address->function);
+ if (!device)
return NULL;
- }
-
- vendor = virPCIDeviceReadID(dev, "vendor");
- product = virPCIDeviceReadID(dev, "device");
-
- if (!vendor || !product) {
- virReportError(VIR_ERR_INTERNAL_ERROR,
- _("Failed to read product/vendor ID for %1$s"),
- dev->name);
+ dev->device = g_memdup(device, sizeof(*dev->device));
+ if (!dev->device) {
+ virReportSystemError(errno,
+ _("Not found device domain: %1$d, bus: %2$d, slot: %3$d, function: %4$d"),
+ address->domain, address->bus, address->slot, address->function);
return NULL;
}
-
- /* strings contain '0x' prefix */
- if (g_snprintf(dev->id, sizeof(dev->id), "%s %s", &vendor[2],
- &product[2]) >= sizeof(dev->id)) {
+ if (g_snprintf(dev->id, sizeof(dev->id), "%x %x", dev->device->vendor_id, dev->device->device_id) >= sizeof(dev->id)) {
virReportError(VIR_ERR_INTERNAL_ERROR,
- _("dev->id buffer overflow: %1$s %2$s"),
- &vendor[2], &product[2]);
+ _("dev->id buffer overflow: %1$d %2$d"),
+ dev->device->vendor_id, dev->device->device_id);
return NULL;
}
@@ -1918,10 +1721,10 @@ virPCIDeviceCopy(virPCIDevice *dev)
/* shallow copy to take care of most attributes */
*copy = *dev;
- copy->path = NULL;
- copy->used_by_drvname = copy->used_by_domname = NULL;
+ copy->device = NULL;
+ copy->device = g_memdup(dev->device, sizeof(*dev->device));
+ copy->name = copy->used_by_drvname = copy->used_by_domname = copy->stubDriverName = NULL;
copy->name = g_strdup(dev->name);
- copy->path = g_strdup(dev->path);
copy->used_by_drvname = g_strdup(dev->used_by_drvname);
copy->used_by_domname = g_strdup(dev->used_by_domname);
copy->stubDriverName = g_strdup(dev->stubDriverName);
@@ -1936,10 +1739,11 @@ virPCIDeviceFree(virPCIDevice *dev)
return;
VIR_DEBUG("%s %s: freeing", dev->id, dev->name);
g_free(dev->name);
- g_free(dev->path);
g_free(dev->used_by_drvname);
g_free(dev->used_by_domname);
g_free(dev->stubDriverName);
+ if (dev->device)
+ g_free(dev->device);
g_free(dev);
}
@@ -1971,9 +1775,9 @@ virPCIDeviceGetName(virPCIDevice *dev)
* config file.
*/
const char *
-virPCIDeviceGetConfigPath(virPCIDevice *dev)
+virPCIDeviceGetConfigPath(virPCIDevice *dev G_GNUC_UNUSED)
{
- return dev->path;
+ return NULL;
}
void virPCIDeviceSetManaged(virPCIDevice *dev, bool managed)
@@ -2484,47 +2288,37 @@ virPCIDeviceDownstreamLacksACS(virPCIDevice *dev)
uint16_t flags;
uint16_t ctrl;
unsigned int pos;
- int fd;
- int ret = 0;
uint16_t device_class;
- if ((fd = virPCIDeviceConfigOpen(dev)) < 0)
+ if (virPCIDeviceInit(dev) < 0) {
return -1;
-
- if (virPCIDeviceInit(dev, fd) < 0) {
- ret = -1;
- goto cleanup;
}
if (virPCIDeviceReadClass(dev, &device_class) < 0)
- goto cleanup;
+ return 0;
pos = dev->pcie_cap_pos;
if (!pos || device_class != PCI_CLASS_BRIDGE_PCI)
- goto cleanup;
+ return 0;
- flags = virPCIDeviceRead16(dev, fd, pos + PCI_EXP_FLAGS);
+ pci_device_cfg_read_u16(dev->device, &flags, pos + PCI_EXP_FLAGS);
if (((flags & PCI_EXP_FLAGS_TYPE) >> 4) != PCI_EXP_TYPE_DOWNSTREAM)
- goto cleanup;
+ return 0;
- pos = virPCIDeviceFindExtendedCapabilityOffset(dev, fd, PCI_EXT_CAP_ID_ACS);
+ pos = virPCIDeviceFindExtendedCapabilityOffset(dev, PCI_EXT_CAP_ID_ACS);
if (!pos) {
VIR_DEBUG("%s %s: downstream port lacks ACS", dev->id, dev->name);
- ret = 1;
- goto cleanup;
+ return 1;
}
- ctrl = virPCIDeviceRead16(dev, fd, pos + PCI_EXT_ACS_CTRL);
+ pci_device_cfg_read_u16(dev->device, &ctrl, pos + PCI_EXT_ACS_CTRL);
if ((ctrl & PCI_EXT_CAP_ACS_ENABLED) != PCI_EXT_CAP_ACS_ENABLED) {
VIR_DEBUG("%s %s: downstream port has ACS disabled",
dev->id, dev->name);
- ret = 1;
- goto cleanup;
+ return 1;
}
- cleanup:
- virPCIDeviceConfigClose(dev, fd);
- return ret;
+ return 0;
}
static int
@@ -3189,48 +2983,27 @@ virPCIDeviceGetVPD(virPCIDevice *dev G_GNUC_UNUSED)
int
virPCIDeviceIsPCIExpress(virPCIDevice *dev)
{
- int fd;
- int ret = -1;
-
- if ((fd = virPCIDeviceConfigOpen(dev)) < 0)
- return ret;
-
- if (virPCIDeviceInit(dev, fd) < 0)
- goto cleanup;
-
- ret = dev->is_pcie;
+ if (virPCIDeviceInit(dev) < 0)
+ return -1;
- cleanup:
- virPCIDeviceConfigClose(dev, fd);
- return ret;
+ return dev->is_pcie;
}
int
virPCIDeviceHasPCIExpressLink(virPCIDevice *dev)
{
- int fd;
- int ret = -1;
uint16_t cap, type;
-
- if ((fd = virPCIDeviceConfigOpen(dev)) < 0)
- return ret;
-
- if (virPCIDeviceInit(dev, fd) < 0)
- goto cleanup;
+ if (virPCIDeviceInit(dev) < 0)
+ return -1;
if (dev->pcie_cap_pos == 0) {
- ret = 0;
- goto cleanup;
+ return 0;
}
- cap = virPCIDeviceRead16(dev, fd, dev->pcie_cap_pos + PCI_CAP_FLAGS);
+ pci_device_cfg_read_u16(dev->device, &cap, dev->pcie_cap_pos + PCI_CAP_FLAGS);
type = (cap & PCI_EXP_FLAGS_TYPE) >> 4;
- ret = type != PCI_EXP_TYPE_ROOT_INT_EP && type != PCI_EXP_TYPE_ROOT_EC;
-
- cleanup:
- virPCIDeviceConfigClose(dev, fd);
- return ret;
+ return type != PCI_EXP_TYPE_ROOT_INT_EP && type != PCI_EXP_TYPE_ROOT_EC;
}
int
@@ -3242,53 +3015,39 @@ virPCIDeviceGetLinkCapSta(virPCIDevice *dev,
unsigned int *sta_width)
{
uint32_t t;
- int fd;
- int ret = -1;
-
- if ((fd = virPCIDeviceConfigOpen(dev)) < 0)
- return ret;
-
- if (virPCIDeviceInit(dev, fd) < 0)
- goto cleanup;
+ uint16_t t16;
+ if (virPCIDeviceInit(dev) < 0)
+ return -1;
if (!dev->pcie_cap_pos) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("pci device %1$s is not a PCI-Express device"),
dev->name);
- goto cleanup;
+ return -1;
}
- t = virPCIDeviceRead32(dev, fd, dev->pcie_cap_pos + PCI_EXP_LNKCAP);
+ pci_device_cfg_read_u32(dev->device, &t, dev->pcie_cap_pos + PCI_EXP_LNKCAP);
*cap_port = t >> 24;
*cap_speed = t & PCI_EXP_LNKCAP_SPEED;
*cap_width = (t & PCI_EXP_LNKCAP_WIDTH) >> 4;
- t = virPCIDeviceRead16(dev, fd, dev->pcie_cap_pos + PCI_EXP_LNKSTA);
+ pci_device_cfg_read_u16(dev->device, &t16, dev->pcie_cap_pos + PCI_EXP_LNKSTA);
+ t = t16;
*sta_speed = t & PCI_EXP_LNKSTA_SPEED;
*sta_width = (t & PCI_EXP_LNKSTA_WIDTH) >> 4;
- ret = 0;
-
- cleanup:
- virPCIDeviceConfigClose(dev, fd);
- return ret;
+ return 0;
}
int virPCIGetHeaderType(virPCIDevice *dev, int *hdrType)
{
- int fd;
uint8_t type;
*hdrType = -1;
- if ((fd = virPCIDeviceConfigOpen(dev)) < 0)
- return -1;
-
- type = virPCIDeviceRead8(dev, fd, PCI_HEADER_TYPE);
-
- virPCIDeviceConfigClose(dev, fd);
+ pci_device_cfg_read_u8(dev->device, &type, PCI_HEADER_TYPE);
type &= PCI_HEADER_TYPE_MASK;
if (type >= VIR_PCI_HEADER_LAST) {
diff --git a/tests/virpcimock.c b/tests/virpcimock.c
index 5b923c63ce..36bb57edb0 100644
--- a/tests/virpcimock.c
+++ b/tests/virpcimock.c
@@ -1,5 +1,6 @@
/*
* Copyright (C) 2013 Red Hat, Inc.
+ * Copyright (C) 2024-2025 Future Crew, LLC
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
@@ -22,7 +23,7 @@
#include "virpcivpdpriv.h"
-#if defined(__linux__) || defined(__FreeBSD__) || defined(__APPLE__)
+#if defined(__linux__) || defined(__APPLE__)
# define VIR_MOCK_LOOKUP_MAIN
# include "virmock.h"
# include "virpci.h"
@@ -42,6 +43,10 @@ static int (*real___open_2)(const char *path, int flags);
static int (*real_close)(int fd);
static DIR * (*real_opendir)(const char *name);
static char *(*real_virFileCanonicalizePath)(const char *path);
+static int (*real_scandir)(const char *restrict dirp,
+ struct dirent ***restrict namelist,
+ typeof(int(const struct dirent *)) *filter,
+ typeof(int(const struct dirent **, const struct dirent **)) *compar);
static char *fakerootdir;
@@ -955,6 +960,7 @@ init_syms(void)
VIR_MOCK_REAL_INIT(opendir);
# endif
VIR_MOCK_REAL_INIT(virFileCanonicalizePath);
+ VIR_MOCK_REAL_INIT(scandir);
}
static void
@@ -1172,6 +1178,20 @@ virFileCanonicalizePath(const char *path)
return real_virFileCanonicalizePath(newpath);
}
+int scandir(const char *restrict dirp, struct dirent ***restrict namelist,
+ typeof(int(const struct dirent *)) *filter,
+ typeof(int(const struct dirent **, const struct dirent **)) *compar)
+{
+ g_autofree char *newpath = NULL;
+
+ init_syms();
+
+ if (getrealpath(&newpath, dirp) < 0)
+ return -1;
+
+ return real_scandir(newpath, namelist, filter, compar);
+}
+
# include "virmockstathelpers.c"
#else
--
2.46.1
