mirror of
https://gitlab.com/libvirt/libvirt.git
synced 2024-08-27 11:01:19 +00:00
Windows doesn't allow : in filenames.
Commit 21685c955e
added files with a : in
their names. This broke git operations on Windows as git is not able to
create those files on clone or pull.
Replace : with - in the offending filenames and adapt the test case.
1027 lines
26 KiB
C
1027 lines
26 KiB
C
/*
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* Copyright (C) 2013 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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* Author: Michal Privoznik <mprivozn@redhat.com>
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*/
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#include <config.h>
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#ifdef __linux__
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# include "internal.h"
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# include <stdio.h>
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# include <dlfcn.h>
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# include <stdlib.h>
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# include <unistd.h>
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# include <fcntl.h>
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# include <sys/stat.h>
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# include <stdarg.h>
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# include <dirent.h>
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# include "viralloc.h"
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# include "virstring.h"
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# include "virfile.h"
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# include "dirname.h"
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static int (*realaccess)(const char *path, int mode);
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static int (*reallstat)(const char *path, struct stat *sb);
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static int (*real__lxstat)(int ver, const char *path, struct stat *sb);
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static int (*realstat)(const char *path, struct stat *sb);
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static int (*real__xstat)(int ver, const char *path, struct stat *sb);
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static char *(*realcanonicalize_file_name)(const char *path);
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static int (*realopen)(const char *path, int flags, ...);
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static int (*realclose)(int fd);
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static DIR * (*realopendir)(const char *name);
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/* Don't make static, since it causes problems with clang
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* when passed as an arg to virAsprintf()
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* vircgroupmock.c:462:22: error: static variable 'fakesysfsdir' is used in an inline function with external linkage [-Werror,-Wstatic-in-inline]
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*/
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char *fakesysfsdir;
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# define PCI_SYSFS_PREFIX "/sys/bus/pci/"
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# define STDERR(...) \
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fprintf(stderr, "%s %zu: ", __FUNCTION__, (size_t) __LINE__); \
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fprintf(stderr, __VA_ARGS__); \
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fprintf(stderr, "\n"); \
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# define ABORT(...) \
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do { \
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STDERR(__VA_ARGS__); \
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abort(); \
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} while (0)
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# define ABORT_OOM() \
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ABORT("Out of memory")
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/*
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* The plan:
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*
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* Mock some file handling functions. Redirect them into a stub tree passed via
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* LIBVIRT_FAKE_SYSFS_DIR env variable. All files and links within stub tree is
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* created by us. There are some actions that we must take if some special
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* files are written to. Here's the list of files we watch:
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*
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* /sys/bus/pci/drivers/<driver>/new_id:
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* Learn the driver new vendor and device combination.
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* Data in format "VVVV DDDD".
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*
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* /sys/bus/pci/drivers/<driver>/remove_id
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* Make the driver forget about vendor and device.
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* Data in format "VVVV DDDD".
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*
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* /sys/bus/pci/drivers/<driver>/bind
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* Check if driver supports the device and bind driver to it (create symlink
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* called 'driver' pointing to the /sys/but/pci/drivers/<driver>).
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* Data in format "DDDD:BB:DD.F" (Domain:Bus:Device.Function).
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*
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* /sys/bus/pci/drivers/<driver>/unbind
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* Unbind driver from the device.
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* Data in format "DDDD:BB:DD.F" (Domain:Bus:Device.Function).
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*
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* /sys/bus/pci/drivers_probe
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* Probe for a driver that handles the specified device.
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* Data in format "DDDD:BB:DD.F" (Domain:Bus:Device.Function).
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*
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* As a little hack, we are not mocking write to these files, but close()
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* instead. The advantage is we don't need any self growing array to hold the
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* partial writes and construct them back. We can let all the writes finish,
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* and then just read the file content back.
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*/
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/*
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*
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* Functions to model kernel behavior
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*
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*/
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enum driverActions {
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PCI_ACTION_BIND = 1 << 0,
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PCI_ACTION_UNBIND = 1 << 1,
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PCI_ACTION_NEW_ID = 1 << 2,
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PCI_ACTION_REMOVE_ID = 1 << 3,
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};
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struct pciDriver {
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char *name;
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int *vendor; /* List of vendor:device IDs the driver can handle */
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int *device;
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size_t len; /* @len is used for both @vendor and @device */
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unsigned int fail; /* Bitwise-OR of driverActions that should fail */
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};
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struct pciDevice {
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char *id;
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int vendor;
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int device;
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int class;
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struct pciDriver *driver; /* Driver attached. NULL if attached to no driver */
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};
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struct fdCallback {
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int fd;
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char *path;
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};
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struct pciDevice **pciDevices = NULL;
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size_t nPciDevices = 0;
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struct pciDriver **pciDrivers = NULL;
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size_t nPciDrivers = 0;
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struct fdCallback *callbacks = NULL;
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size_t nCallbacks = 0;
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static void init_env(void);
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static int pci_device_autobind(struct pciDevice *dev);
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static void pci_device_new_from_stub(const struct pciDevice *data);
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static struct pciDevice *pci_device_find_by_id(const char *id);
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static struct pciDevice *pci_device_find_by_content(const char *path);
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static void pci_driver_new(const char *name, int fail, ...);
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static struct pciDriver *pci_driver_find_by_dev(struct pciDevice *dev);
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static struct pciDriver *pci_driver_find_by_path(const char *path);
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static int pci_driver_bind(struct pciDriver *driver, struct pciDevice *dev);
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static int pci_driver_unbind(struct pciDriver *driver, struct pciDevice *dev);
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static int pci_driver_handle_change(int fd, const char *path);
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static int pci_driver_handle_bind(const char *path);
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static int pci_driver_handle_unbind(const char *path);
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static int pci_driver_handle_new_id(const char *path);
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static int pci_driver_handle_remove_id(const char *path);
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/*
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* Helper functions
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*/
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static void
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make_file(const char *path,
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const char *name,
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const char *value,
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ssize_t len)
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{
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int fd = -1;
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char *filepath = NULL;
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if (value && len == -1)
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len = strlen(value);
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if (virAsprintfQuiet(&filepath, "%s/%s", path, name) < 0)
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ABORT_OOM();
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if ((fd = realopen(filepath, O_CREAT|O_WRONLY, 0666)) < 0)
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ABORT("Unable to open: %s", filepath);
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if (value && safewrite(fd, value, len) != len)
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ABORT("Unable to write: %s", filepath);
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VIR_FORCE_CLOSE(fd);
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VIR_FREE(filepath);
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}
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static int
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pci_read_file(const char *path,
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char *buf,
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size_t buf_size)
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{
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int ret = -1;
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int fd = -1;
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char *newpath;
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if (virAsprintfQuiet(&newpath, "%s/%s",
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fakesysfsdir,
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path + strlen(PCI_SYSFS_PREFIX)) < 0) {
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errno = ENOMEM;
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goto cleanup;
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}
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if ((fd = realopen(newpath, O_RDWR)) < 0)
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goto cleanup;
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bzero(buf, buf_size);
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if (saferead(fd, buf, buf_size - 1) < 0) {
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STDERR("Unable to read from %s", newpath);
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goto cleanup;
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}
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if (ftruncate(fd, 0) < 0)
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goto cleanup;
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ret = 0;
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cleanup:
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VIR_FREE(newpath);
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realclose(fd);
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return ret;
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}
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static int
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getrealpath(char **newpath,
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const char *path)
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{
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if (!fakesysfsdir)
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init_env();
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if (STRPREFIX(path, PCI_SYSFS_PREFIX)) {
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if (virAsprintfQuiet(newpath, "%s/%s",
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fakesysfsdir,
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path + strlen(PCI_SYSFS_PREFIX)) < 0) {
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errno = ENOMEM;
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return -1;
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}
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} else {
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if (VIR_STRDUP_QUIET(*newpath, path) < 0)
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return -1;
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}
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return 0;
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}
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static bool
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find_fd(int fd, size_t *indx)
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{
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size_t i;
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for (i = 0; i < nCallbacks; i++) {
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if (callbacks[i].fd == fd) {
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if (indx)
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*indx = i;
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return true;
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}
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}
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return false;
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}
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static int
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add_fd(int fd, const char *path)
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{
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int ret = -1;
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size_t i;
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if (find_fd(fd, &i)) {
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struct fdCallback cb = callbacks[i];
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ABORT("FD %d %s already present in the array as %d %s",
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fd, path, cb.fd, cb.path);
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}
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if (VIR_REALLOC_N_QUIET(callbacks, nCallbacks + 1) < 0 ||
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VIR_STRDUP_QUIET(callbacks[nCallbacks].path, path) < 0) {
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errno = ENOMEM;
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goto cleanup;
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}
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callbacks[nCallbacks++].fd = fd;
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ret = 0;
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cleanup:
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return ret;
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}
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static int
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remove_fd(int fd)
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{
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int ret = -1;
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size_t i;
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if (find_fd(fd, &i)) {
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struct fdCallback cb = callbacks[i];
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if (pci_driver_handle_change(cb.fd, cb.path) < 0)
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goto cleanup;
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VIR_FREE(cb.path);
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if (VIR_DELETE_ELEMENT(callbacks, i, nCallbacks) < 0) {
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errno = EINVAL;
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goto cleanup;
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}
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}
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ret = 0;
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cleanup:
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return ret;
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}
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|
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/*
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* PCI Device functions
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*/
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static void
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pci_device_new_from_stub(const struct pciDevice *data)
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{
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struct pciDevice *dev;
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char *devpath;
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char *id;
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char *c;
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char *configSrc;
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char tmp[32];
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struct stat sb;
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if (VIR_STRDUP_QUIET(id, data->id) < 0)
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ABORT_OOM();
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/* Replace ':' with '-' to create the config filename from the
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* device ID. The device ID cannot be used directly as filename
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* because it contains ':' and Windows does not allow ':' in
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* filenames. */
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c = strchr(id, ':');
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while (c) {
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*c = '-';
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c = strchr(c, ':');
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}
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if (VIR_ALLOC_QUIET(dev) < 0 ||
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virAsprintfQuiet(&configSrc, "%s/virpcitestdata/%s.config",
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abs_srcdir, id) < 0 ||
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virAsprintfQuiet(&devpath, "%s/devices/%s", fakesysfsdir, data->id) < 0)
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ABORT_OOM();
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VIR_FREE(id);
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memcpy(dev, data, sizeof(*dev));
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if (virFileMakePath(devpath) < 0)
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ABORT("Unable to create: %s", devpath);
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/* If there is a config file for the device within virpcitestdata dir,
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* symlink it. Otherwise create a dummy config file. */
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if ((realstat && realstat(configSrc, &sb) == 0) ||
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(real__xstat && real__xstat(_STAT_VER, configSrc, &sb) == 0)) {
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/* On success, copy @configSrc into the destination (a copy,
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* rather than a symlink, is required since we write into the
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* file, and parallel VPATH builds must not stomp on the
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* original; besides, 'make distcheck' requires the original
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* to be read-only */
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char *buf;
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ssize_t len;
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if ((len = virFileReadAll(configSrc, 4096, &buf)) < 0)
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ABORT("Unable to read config file '%s'", configSrc);
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|
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make_file(devpath, "config", buf, len);
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VIR_FREE(buf);
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} else {
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/* If there's no config data in the virpcitestdata dir, create a dummy
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* config file */
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make_file(devpath, "config", "some dummy config", -1);
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}
|
|
|
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if (snprintf(tmp, sizeof(tmp), "0x%.4x", dev->vendor) < 0)
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ABORT("@tmp overflow");
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make_file(devpath, "vendor", tmp, -1);
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|
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if (snprintf(tmp, sizeof(tmp), "0x%.4x", dev->device) < 0)
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ABORT("@tmp overflow");
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make_file(devpath, "device", tmp, -1);
|
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|
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if (snprintf(tmp, sizeof(tmp), "0x%.4x", dev->class) < 0)
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ABORT("@tmp overflow");
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make_file(devpath, "class", tmp, -1);
|
|
|
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if (pci_device_autobind(dev) < 0)
|
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ABORT("Unable to bind: %s", data->id);
|
|
|
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if (VIR_APPEND_ELEMENT_QUIET(pciDevices, nPciDevices, dev) < 0)
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ABORT_OOM();
|
|
|
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VIR_FREE(devpath);
|
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VIR_FREE(configSrc);
|
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}
|
|
|
|
static struct pciDevice *
|
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pci_device_find_by_id(const char *id)
|
|
{
|
|
size_t i;
|
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for (i = 0; i < nPciDevices; i++) {
|
|
struct pciDevice *dev = pciDevices[i];
|
|
|
|
if (STREQ(dev->id, id))
|
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return dev;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static struct pciDevice *
|
|
pci_device_find_by_content(const char *path)
|
|
{
|
|
char tmp[32];
|
|
|
|
if (pci_read_file(path, tmp, sizeof(tmp)) < 0)
|
|
return NULL;
|
|
|
|
return pci_device_find_by_id(tmp);
|
|
}
|
|
|
|
static int
|
|
pci_device_autobind(struct pciDevice *dev)
|
|
{
|
|
struct pciDriver *driver = pci_driver_find_by_dev(dev);
|
|
|
|
if (!driver) {
|
|
/* No driver found. Nothing to do */
|
|
return 0;
|
|
}
|
|
|
|
return pci_driver_bind(driver, dev);
|
|
}
|
|
|
|
|
|
/*
|
|
* PCI Driver functions
|
|
*/
|
|
static void
|
|
pci_driver_new(const char *name, int fail, ...)
|
|
{
|
|
struct pciDriver *driver;
|
|
va_list args;
|
|
int vendor, device;
|
|
char *driverpath;
|
|
|
|
if (VIR_ALLOC_QUIET(driver) < 0 ||
|
|
VIR_STRDUP_QUIET(driver->name, name) < 0 ||
|
|
virAsprintfQuiet(&driverpath, "%s/drivers/%s", fakesysfsdir, name) < 0)
|
|
ABORT_OOM();
|
|
|
|
driver->fail = fail;
|
|
|
|
if (virFileMakePath(driverpath) < 0)
|
|
ABORT("Unable to create: %s", driverpath);
|
|
|
|
va_start(args, fail);
|
|
|
|
while ((vendor = va_arg(args, int)) != -1) {
|
|
if ((device = va_arg(args, int)) == -1)
|
|
ABORT("Invalid vendor device pair for driver %s", name);
|
|
|
|
if (VIR_REALLOC_N_QUIET(driver->vendor, driver->len + 1) < 0 ||
|
|
VIR_REALLOC_N_QUIET(driver->device, driver->len + 1) < 0)
|
|
ABORT_OOM();
|
|
|
|
driver->vendor[driver->len] = vendor;
|
|
driver->device[driver->len] = device;
|
|
driver->len++;
|
|
}
|
|
|
|
va_end(args);
|
|
|
|
make_file(driverpath, "bind", NULL, -1);
|
|
make_file(driverpath, "unbind", NULL, -1);
|
|
make_file(driverpath, "new_id", NULL, -1);
|
|
make_file(driverpath, "remove_id", NULL, -1);
|
|
|
|
if (VIR_APPEND_ELEMENT_QUIET(pciDrivers, nPciDrivers, driver) < 0)
|
|
ABORT_OOM();
|
|
}
|
|
|
|
static struct pciDriver *
|
|
pci_driver_find_by_dev(struct pciDevice *dev)
|
|
{
|
|
size_t i;
|
|
|
|
for (i = 0; i < nPciDrivers; i++) {
|
|
struct pciDriver *driver = pciDrivers[i];
|
|
size_t j;
|
|
|
|
for (j = 0; j < driver->len; j++) {
|
|
if (driver->vendor[j] == dev->vendor &&
|
|
driver->device[j] == dev->device)
|
|
return driver;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static struct pciDriver *
|
|
pci_driver_find_by_path(const char *path)
|
|
{
|
|
size_t i;
|
|
|
|
for (i = 0; i < nPciDrivers; i++) {
|
|
struct pciDriver *driver = pciDrivers[i];
|
|
|
|
if (strstr(path, driver->name))
|
|
return driver;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static int
|
|
pci_driver_bind(struct pciDriver *driver,
|
|
struct pciDevice *dev)
|
|
{
|
|
int ret = -1;
|
|
char *devpath = NULL, *driverpath = NULL;
|
|
|
|
if (dev->driver || PCI_ACTION_BIND & driver->fail) {
|
|
/* Device already bound or failing driver requested */
|
|
errno = ENODEV;
|
|
return ret;
|
|
}
|
|
|
|
/* Make symlink under device tree */
|
|
if (virAsprintfQuiet(&devpath, "%s/devices/%s/driver",
|
|
fakesysfsdir, dev->id) < 0 ||
|
|
virAsprintfQuiet(&driverpath, "%s/drivers/%s",
|
|
fakesysfsdir, driver->name) < 0) {
|
|
errno = ENOMEM;
|
|
goto cleanup;
|
|
}
|
|
|
|
if (symlink(driverpath, devpath) < 0)
|
|
goto cleanup;
|
|
|
|
/* Make symlink under driver tree */
|
|
VIR_FREE(devpath);
|
|
VIR_FREE(driverpath);
|
|
if (virAsprintfQuiet(&devpath, "%s/devices/%s",
|
|
fakesysfsdir, dev->id) < 0 ||
|
|
virAsprintfQuiet(&driverpath, "%s/drivers/%s/%s",
|
|
fakesysfsdir, driver->name, dev->id) < 0) {
|
|
errno = ENOMEM;
|
|
goto cleanup;
|
|
}
|
|
|
|
if (symlink(devpath, driverpath) < 0)
|
|
goto cleanup;
|
|
|
|
dev->driver = driver;
|
|
ret = 0;
|
|
cleanup:
|
|
VIR_FREE(devpath);
|
|
VIR_FREE(driverpath);
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
pci_driver_unbind(struct pciDriver *driver,
|
|
struct pciDevice *dev)
|
|
{
|
|
int ret = -1;
|
|
char *devpath = NULL, *driverpath = NULL;
|
|
|
|
if (dev->driver != driver || PCI_ACTION_UNBIND & driver->fail) {
|
|
/* Device not bound to the @driver or failing driver used */
|
|
errno = ENODEV;
|
|
return ret;
|
|
}
|
|
|
|
/* Make symlink under device tree */
|
|
if (virAsprintfQuiet(&devpath, "%s/devices/%s/driver",
|
|
fakesysfsdir, dev->id) < 0 ||
|
|
virAsprintfQuiet(&driverpath, "%s/drivers/%s/%s",
|
|
fakesysfsdir, driver->name, dev->id) < 0) {
|
|
errno = ENOMEM;
|
|
goto cleanup;
|
|
}
|
|
|
|
if (unlink(devpath) < 0 ||
|
|
unlink(driverpath) < 0)
|
|
goto cleanup;
|
|
|
|
dev->driver = NULL;
|
|
ret = 0;
|
|
cleanup:
|
|
VIR_FREE(devpath);
|
|
VIR_FREE(driverpath);
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
pci_driver_handle_drivers_probe(const char *path)
|
|
{
|
|
struct pciDevice *dev;
|
|
|
|
if (!(dev = pci_device_find_by_content(path))) {
|
|
errno = ENODEV;
|
|
return -1;
|
|
}
|
|
|
|
if (dev->driver)
|
|
return 0;
|
|
|
|
return pci_device_autobind(dev);
|
|
}
|
|
|
|
static int
|
|
pci_driver_handle_change(int fd ATTRIBUTE_UNUSED, const char *path)
|
|
{
|
|
int ret;
|
|
const char *file = last_component(path);
|
|
|
|
if (STREQ(file, "bind"))
|
|
ret = pci_driver_handle_bind(path);
|
|
else if (STREQ(file, "unbind"))
|
|
ret = pci_driver_handle_unbind(path);
|
|
else if (STREQ(file, "new_id"))
|
|
ret = pci_driver_handle_new_id(path);
|
|
else if (STREQ(file, "remove_id"))
|
|
ret = pci_driver_handle_remove_id(path);
|
|
else if (STREQ(file, "drivers_probe"))
|
|
ret = pci_driver_handle_drivers_probe(path);
|
|
else
|
|
ABORT("Not handled write to: %s", path);
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
pci_driver_handle_bind(const char *path)
|
|
{
|
|
int ret = -1;
|
|
struct pciDevice *dev = pci_device_find_by_content(path);
|
|
struct pciDriver *driver = pci_driver_find_by_path(path);
|
|
|
|
if (!driver || !dev) {
|
|
/* This should never happen (TM) */
|
|
errno = ENODEV;
|
|
goto cleanup;
|
|
}
|
|
|
|
ret = pci_driver_bind(driver, dev);
|
|
cleanup:
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
pci_driver_handle_unbind(const char *path)
|
|
{
|
|
int ret = -1;
|
|
struct pciDevice *dev = pci_device_find_by_content(path);
|
|
|
|
if (!dev || !dev->driver) {
|
|
/* This should never happen (TM) */
|
|
errno = ENODEV;
|
|
goto cleanup;
|
|
}
|
|
|
|
ret = pci_driver_unbind(dev->driver, dev);
|
|
cleanup:
|
|
return ret;
|
|
}
|
|
static int
|
|
pci_driver_handle_new_id(const char *path)
|
|
{
|
|
int ret = -1;
|
|
struct pciDriver *driver = pci_driver_find_by_path(path);
|
|
size_t i;
|
|
int vendor, device;
|
|
char buf[32];
|
|
|
|
if (!driver || PCI_ACTION_NEW_ID & driver->fail) {
|
|
errno = ENODEV;
|
|
goto cleanup;
|
|
}
|
|
|
|
if (pci_read_file(path, buf, sizeof(buf)) < 0)
|
|
goto cleanup;
|
|
|
|
if (sscanf(buf, "%x %x", &vendor, &device) < 2) {
|
|
errno = EINVAL;
|
|
goto cleanup;
|
|
}
|
|
|
|
for (i = 0; i < driver->len; i++) {
|
|
if (driver->vendor[i] == vendor &&
|
|
driver->device[i] == device)
|
|
break;
|
|
}
|
|
|
|
if (i == driver->len) {
|
|
if (VIR_REALLOC_N_QUIET(driver->vendor, driver->len + 1) < 0 ||
|
|
VIR_REALLOC_N_QUIET(driver->device, driver->len + 1) < 0) {
|
|
errno = ENOMEM;
|
|
goto cleanup;
|
|
}
|
|
|
|
driver->vendor[driver->len] = vendor;
|
|
driver->device[driver->len] = device;
|
|
driver->len++;
|
|
}
|
|
|
|
for (i = 0; i < nPciDevices; i++) {
|
|
struct pciDevice *dev = pciDevices[i];
|
|
|
|
if (!dev->driver &&
|
|
dev->vendor == vendor &&
|
|
dev->device == device &&
|
|
pci_driver_bind(driver, dev) < 0)
|
|
goto cleanup;
|
|
}
|
|
|
|
ret = 0;
|
|
cleanup:
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
pci_driver_handle_remove_id(const char *path)
|
|
{
|
|
int ret = -1;
|
|
struct pciDriver *driver = pci_driver_find_by_path(path);
|
|
size_t i;
|
|
int vendor, device;
|
|
char buf[32];
|
|
|
|
if (!driver || PCI_ACTION_REMOVE_ID & driver->fail) {
|
|
errno = ENODEV;
|
|
goto cleanup;
|
|
}
|
|
|
|
if (pci_read_file(path, buf, sizeof(buf)) < 0)
|
|
goto cleanup;
|
|
|
|
if (sscanf(buf, "%x %x", &vendor, &device) < 2) {
|
|
errno = EINVAL;
|
|
goto cleanup;
|
|
}
|
|
|
|
for (i = 0; i < driver->len; i++) {
|
|
if (driver->vendor[i] == vendor &&
|
|
driver->device[i] == device)
|
|
continue;
|
|
}
|
|
|
|
if (i != driver->len) {
|
|
if (VIR_DELETE_ELEMENT(driver->vendor, i, driver->len) < 0)
|
|
goto cleanup;
|
|
driver->len++;
|
|
if (VIR_DELETE_ELEMENT(driver->device, i, driver->len) < 0)
|
|
goto cleanup;
|
|
}
|
|
|
|
ret = 0;
|
|
cleanup:
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*
|
|
* Functions to load the symbols and init the environment
|
|
*/
|
|
static void
|
|
init_syms(void)
|
|
{
|
|
if (realaccess)
|
|
return;
|
|
|
|
# define LOAD_SYM(name) \
|
|
do { \
|
|
if (!(real ## name = dlsym(RTLD_NEXT, #name))) \
|
|
ABORT("Cannot find real '%s' symbol\n", #name); \
|
|
} while (0)
|
|
|
|
# define LOAD_SYM_ALT(name1, name2) \
|
|
do { \
|
|
if (!(real ## name1 = dlsym(RTLD_NEXT, #name1)) && \
|
|
!(real ## name2 = dlsym(RTLD_NEXT, #name2))) \
|
|
ABORT("Cannot find real '%s' or '%s' symbol\n", \
|
|
#name1, #name2); \
|
|
} while (0)
|
|
|
|
LOAD_SYM(access);
|
|
LOAD_SYM_ALT(lstat, __lxstat);
|
|
LOAD_SYM_ALT(stat, __xstat);
|
|
LOAD_SYM(canonicalize_file_name);
|
|
LOAD_SYM(open);
|
|
LOAD_SYM(close);
|
|
LOAD_SYM(opendir);
|
|
}
|
|
|
|
static void
|
|
init_env(void)
|
|
{
|
|
if (fakesysfsdir)
|
|
return;
|
|
|
|
if (!(fakesysfsdir = getenv("LIBVIRT_FAKE_SYSFS_DIR")))
|
|
ABORT("Missing LIBVIRT_FAKE_SYSFS_DIR env variable\n");
|
|
|
|
make_file(fakesysfsdir, "drivers_probe", NULL, -1);
|
|
|
|
# define MAKE_PCI_DRIVER(name, ...) \
|
|
pci_driver_new(name, 0, __VA_ARGS__, -1, -1)
|
|
|
|
MAKE_PCI_DRIVER("iwlwifi", 0x8086, 0x0044);
|
|
MAKE_PCI_DRIVER("i915", 0x8086, 0x0046, 0x8086, 0x0047);
|
|
MAKE_PCI_DRIVER("pci-stub", -1, -1);
|
|
pci_driver_new("vfio-pci", PCI_ACTION_BIND, -1, -1);
|
|
|
|
# define MAKE_PCI_DEVICE(Id, Vendor, Device, ...) \
|
|
do { \
|
|
struct pciDevice dev = {.id = (char *)Id, .vendor = Vendor, \
|
|
.device = Device, __VA_ARGS__}; \
|
|
pci_device_new_from_stub(&dev); \
|
|
} while (0)
|
|
|
|
MAKE_PCI_DEVICE("0000:00:00.0", 0x8086, 0x0044);
|
|
MAKE_PCI_DEVICE("0000:00:01.0", 0x8086, 0x0044);
|
|
MAKE_PCI_DEVICE("0000:00:02.0", 0x8086, 0x0046);
|
|
MAKE_PCI_DEVICE("0000:00:03.0", 0x8086, 0x0048);
|
|
MAKE_PCI_DEVICE("0001:00:00.0", 0x1014, 0x03b9, .class = 0x060400);
|
|
MAKE_PCI_DEVICE("0001:01:00.0", 0x8086, 0x105e);
|
|
MAKE_PCI_DEVICE("0001:01:00.1", 0x8086, 0x105e);
|
|
MAKE_PCI_DEVICE("0005:80:00.0", 0x10b5, 0x8112, .class = 0x060400);
|
|
MAKE_PCI_DEVICE("0005:90:01.0", 0x1033, 0x0035);
|
|
MAKE_PCI_DEVICE("0005:90:01.1", 0x1033, 0x0035);
|
|
MAKE_PCI_DEVICE("0005:90:01.2", 0x1033, 0x00e0);
|
|
MAKE_PCI_DEVICE("0000:0a:01.0", 0x8086, 0x0047);
|
|
MAKE_PCI_DEVICE("0000:0a:02.0", 0x8286, 0x0048);
|
|
MAKE_PCI_DEVICE("0000:0a:03.0", 0x8386, 0x0048);
|
|
}
|
|
|
|
|
|
/*
|
|
*
|
|
* Mocked functions
|
|
*
|
|
*/
|
|
|
|
int
|
|
access(const char *path, int mode)
|
|
{
|
|
int ret;
|
|
|
|
init_syms();
|
|
|
|
if (STRPREFIX(path, PCI_SYSFS_PREFIX)) {
|
|
char *newpath;
|
|
if (getrealpath(&newpath, path) < 0)
|
|
return -1;
|
|
ret = realaccess(newpath, mode);
|
|
VIR_FREE(newpath);
|
|
} else {
|
|
ret = realaccess(path, mode);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int
|
|
__lxstat(int ver, const char *path, struct stat *sb)
|
|
{
|
|
int ret;
|
|
|
|
init_syms();
|
|
|
|
if (STRPREFIX(path, PCI_SYSFS_PREFIX)) {
|
|
char *newpath;
|
|
if (getrealpath(&newpath, path) < 0)
|
|
return -1;
|
|
ret = real__lxstat(ver, newpath, sb);
|
|
VIR_FREE(newpath);
|
|
} else {
|
|
ret = real__lxstat(ver, path, sb);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int
|
|
lstat(const char *path, struct stat *sb)
|
|
{
|
|
int ret;
|
|
|
|
init_syms();
|
|
|
|
if (STRPREFIX(path, PCI_SYSFS_PREFIX)) {
|
|
char *newpath;
|
|
if (getrealpath(&newpath, path) < 0)
|
|
return -1;
|
|
ret = reallstat(newpath, sb);
|
|
VIR_FREE(newpath);
|
|
} else {
|
|
ret = reallstat(path, sb);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int
|
|
__xstat(int ver, const char *path, struct stat *sb)
|
|
{
|
|
int ret;
|
|
|
|
init_syms();
|
|
|
|
if (STRPREFIX(path, PCI_SYSFS_PREFIX)) {
|
|
char *newpath;
|
|
if (getrealpath(&newpath, path) < 0)
|
|
return -1;
|
|
ret = real__xstat(ver, newpath, sb);
|
|
VIR_FREE(newpath);
|
|
} else {
|
|
ret = real__xstat(ver, path, sb);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int
|
|
stat(const char *path, struct stat *sb)
|
|
{
|
|
int ret;
|
|
|
|
init_syms();
|
|
|
|
if (STRPREFIX(path, PCI_SYSFS_PREFIX)) {
|
|
char *newpath;
|
|
if (getrealpath(&newpath, path) < 0)
|
|
return -1;
|
|
ret = realstat(newpath, sb);
|
|
VIR_FREE(newpath);
|
|
} else {
|
|
ret = realstat(path, sb);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
char *
|
|
canonicalize_file_name(const char *path)
|
|
{
|
|
char *ret;
|
|
|
|
init_syms();
|
|
|
|
if (STRPREFIX(path, PCI_SYSFS_PREFIX)) {
|
|
char *newpath;
|
|
if (getrealpath(&newpath, path) < 0)
|
|
return NULL;
|
|
ret = realcanonicalize_file_name(newpath);
|
|
VIR_FREE(newpath);
|
|
} else {
|
|
ret = realcanonicalize_file_name(path);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int
|
|
open(const char *path, int flags, ...)
|
|
{
|
|
int ret;
|
|
char *newpath = NULL;
|
|
|
|
init_syms();
|
|
|
|
if (STRPREFIX(path, PCI_SYSFS_PREFIX) &&
|
|
getrealpath(&newpath, path) < 0)
|
|
return -1;
|
|
|
|
if (flags & O_CREAT) {
|
|
va_list ap;
|
|
mode_t mode;
|
|
va_start(ap, flags);
|
|
mode = va_arg(ap, mode_t);
|
|
va_end(ap);
|
|
ret = realopen(newpath ? newpath : path, flags, mode);
|
|
} else {
|
|
ret = realopen(newpath ? newpath : path, flags);
|
|
}
|
|
|
|
/* Catch both: /sys/bus/pci/drivers/... and
|
|
* /sys/bus/pci/device/.../driver/... */
|
|
if (ret >= 0 && STRPREFIX(path, PCI_SYSFS_PREFIX) &&
|
|
strstr(path, "driver") && add_fd(ret, path) < 0) {
|
|
realclose(ret);
|
|
ret = -1;
|
|
}
|
|
|
|
VIR_FREE(newpath);
|
|
return ret;
|
|
}
|
|
|
|
DIR *
|
|
opendir(const char *path)
|
|
{
|
|
DIR *ret;
|
|
char *newpath = NULL;
|
|
|
|
init_syms();
|
|
|
|
if (STRPREFIX(path, PCI_SYSFS_PREFIX) &&
|
|
getrealpath(&newpath, path) < 0)
|
|
return NULL;
|
|
|
|
ret = realopendir(newpath ? newpath : path);
|
|
|
|
VIR_FREE(newpath);
|
|
return ret;
|
|
}
|
|
|
|
int
|
|
close(int fd)
|
|
{
|
|
if (remove_fd(fd) < 0)
|
|
return -1;
|
|
return realclose(fd);
|
|
}
|
|
#else
|
|
/* Nothing to override on non-__linux__ platforms */
|
|
#endif
|