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util: remove virGetUnprivSGIOSysfsPath

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unpriv_sgio was a downstream-only feature in RHEL 6-8.
The libvirt support was merged upstream by mistake.

Remove the function that constructs the sysfs path and assume it
does not exist in all the callers.

Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
This commit is contained in:
Ján Tomko 2022-01-13 13:09:31 +01:00
parent ae8add363a
commit f322018c23
4 changed files with 17 additions and 127 deletions
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1
src/libvirt_private.syms
View File

@ -3519,7 +3519,6 @@ virGetPassword;
virGetSelfLastChanged;
virGetSystemPageSize;
virGetSystemPageSizeKB;
virGetUnprivSGIOSysfsPath;
virGetUserCacheDirectory;
virGetUserConfigDirectory;
virGetUserDirectory;

43
src/qemu/qemu_conf.c
View File

@ -1484,42 +1484,11 @@ qemuGetSharedDeviceKey(const char *device_path)
* being used and in the future the hostdev information.
*/
static int
qemuCheckUnprivSGIO(GHashTable *sharedDevices,
const char *device_path,
int sgio)
qemuCheckUnprivSGIO(GHashTable *sharedDevices G_GNUC_UNUSED,
const char *device_path G_GNUC_UNUSED,
int sgio G_GNUC_UNUSED)
{
g_autofree char *sysfs_path = NULL;
g_autofree char *key = NULL;
int val;
if (!(sysfs_path = virGetUnprivSGIOSysfsPath(device_path, NULL)))
return -1;
/* It can't be conflict if unpriv_sgio is not supported by kernel. */
if (!virFileExists(sysfs_path))
return 0;
if (!(key = qemuGetSharedDeviceKey(device_path)))
return -1;
/* It can't be conflict if no other domain is sharing it. */
if (!(virHashLookup(sharedDevices, key)))
return 0;
if (virGetDeviceUnprivSGIO(device_path, NULL, &val) < 0)
return -1;
/* Error message on failure needs to be handled in caller
* since there is more specific knowledge of device
*/
if (!((val == 0 &&
(sgio == VIR_DOMAIN_DEVICE_SGIO_FILTERED ||
sgio == VIR_DOMAIN_DEVICE_SGIO_DEFAULT)) ||
(val == 1 &&
sgio == VIR_DOMAIN_DEVICE_SGIO_UNFILTERED))) {
return -2;
}
return 0;
}
@ -1840,7 +1809,6 @@ qemuSetUnprivSGIO(virDomainDeviceDef *dev)
{
virDomainDiskDef *disk = NULL;
virDomainHostdevDef *hostdev = NULL;
g_autofree char *sysfs_path = NULL;
const char *path = NULL;
int val = -1;
@ -1873,9 +1841,6 @@ qemuSetUnprivSGIO(virDomainDeviceDef *dev)
return 0;
}
if (!(sysfs_path = virGetUnprivSGIOSysfsPath(path, NULL)))
return -1;
/* By default, filter the SG_IO commands, i.e. set unpriv_sgio to 0. */
val = (disk->sgio == VIR_DOMAIN_DEVICE_SGIO_UNFILTERED);
@ -1883,7 +1848,7 @@ qemuSetUnprivSGIO(virDomainDeviceDef *dev)
* whitelist is enabled. But if requesting unfiltered access, always call
* virSetDeviceUnprivSGIO, to report an error for unsupported unpriv_sgio.
*/
if (virFileExists(sysfs_path) || val == 1) {
if (val == 1) {
int curr_val;
if (virGetDeviceUnprivSGIO(path, NULL, &curr_val) < 0)

92
src/util/virutil.c
View File

@ -1354,96 +1354,24 @@ virGetDeviceID(const char *path G_GNUC_UNUSED,
}
#endif
#define SYSFS_DEV_BLOCK_PATH "/sys/dev/block"
char *
virGetUnprivSGIOSysfsPath(const char *path,
const char *sysfs_dir)
int
virSetDeviceUnprivSGIO(const char *path G_GNUC_UNUSED,
const char *sysfs_dir G_GNUC_UNUSED,
int unpriv_sgio G_GNUC_UNUSED)
{
int maj, min;
int rc;
if ((rc = virGetDeviceID(path, &maj, &min)) < 0) {
virReportSystemError(-rc,
_("Unable to get device ID '%s'"),
path);
return NULL;
}
return g_strdup_printf("%s/%d:%d/queue/unpriv_sgio",
sysfs_dir ? sysfs_dir : SYSFS_DEV_BLOCK_PATH, maj,
min);
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("unpriv_sgio is not supported by this kernel"));
return -1;
}
int
virSetDeviceUnprivSGIO(const char *path,
const char *sysfs_dir,
int unpriv_sgio)
virGetDeviceUnprivSGIO(const char *path G_GNUC_UNUSED,
const char *sysfs_dir G_GNUC_UNUSED,
int *unpriv_sgio G_GNUC_UNUSED)
{
char *sysfs_path = NULL;
char *val = NULL;
int ret = -1;
int rc;
if (!(sysfs_path = virGetUnprivSGIOSysfsPath(path, sysfs_dir)))
return -1;
if (!virFileExists(sysfs_path)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("unpriv_sgio is not supported by this kernel"));
goto cleanup;
}
val = g_strdup_printf("%d", unpriv_sgio);
if ((rc = virFileWriteStr(sysfs_path, val, 0)) < 0) {
virReportSystemError(-rc, _("failed to set %s"), sysfs_path);
goto cleanup;
}
ret = 0;
cleanup:
VIR_FREE(sysfs_path);
VIR_FREE(val);
return ret;
}
int
virGetDeviceUnprivSGIO(const char *path,
const char *sysfs_dir,
int *unpriv_sgio)
{
char *sysfs_path = NULL;
char *buf = NULL;
char *tmp = NULL;
int ret = -1;
if (!(sysfs_path = virGetUnprivSGIOSysfsPath(path, sysfs_dir)))
return -1;
if (!virFileExists(sysfs_path)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("unpriv_sgio is not supported by this kernel"));
goto cleanup;
}
if (virFileReadAll(sysfs_path, 1024, &buf) < 0)
goto cleanup;
if ((tmp = strchr(buf, '\n')))
*tmp = '\0';
if (virStrToLong_i(buf, NULL, 10, unpriv_sgio) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("failed to parse value of %s"), sysfs_path);
goto cleanup;
}
ret = 0;
cleanup:
VIR_FREE(sysfs_path);
VIR_FREE(buf);
return ret;
}

2
src/util/virutil.h
View File

@ -125,8 +125,6 @@ int virSetDeviceUnprivSGIO(const char *path,
int virGetDeviceUnprivSGIO(const char *path,
const char *sysfs_dir,
int *unpriv_sgio);
char *virGetUnprivSGIOSysfsPath(const char *path,
const char *sysfs_dir);
int virParseOwnershipIds(const char *label, uid_t *uidPtr, gid_t *gidPtr);