util: Remove virsysfs and instead enhance virFileReadValue* functions

It is no longer needed thanks to the great virfilewrapper.c.  And this
way we don't have to add a new set of functions for each prefixed
path.

While on that, add two functions that weren't there before, string and
scaled integer reading ones.  Also increase the length of the string
being read by one to accompany for the optional newline at the
end (i.e. change INT_STRLEN_BOUND to INT_BUFSIZE_BOUND).
Signed-off-by: NMartin Kletzander <mkletzan@redhat.com>

src/Makefile.am

@@ -177,7 +177,6 @@ UTIL_SOURCES =							\
 		util/virstorageencryption.c util/virstorageencryption.h \
 		util/virstoragefile.c util/virstoragefile.h	\
 		util/virstring.h util/virstring.c		\
-		util/virsysfs.c util/virsysfs.h util/virsysfspriv.h \
 		util/virsysinfo.c util/virsysinfo.h util/virsysinfopriv.h		\
 		util/virsystemd.c util/virsystemd.h util/virsystemdpriv.h \
 		util/virthread.c util/virthread.h		\
@@ -2651,7 +2650,6 @@ libvirt_setuid_rpc_client_la_SOURCES = 		\
 		util/virrandom.c		\
 		util/virsocketaddr.c		\
 		util/virstring.c		\
-		util/virsysfs.c			\
 		util/virsystemd.c		\
 		util/virtime.c			\
 		util/virthread.c		\

src/conf/capabilities.c

@@ -45,7 +45,6 @@
 #include "virlog.h"
 #include "virnuma.h"
 #include "virstring.h"
-#include "virsysfs.h"
 #include "virtypedparam.h"
 #include "viruuid.h"
 

src/libvirt_private.syms

@@ -1654,6 +1654,8 @@ virFileReadLimFD;
 virFileReadLink;
 virFileReadValueBitmap;
 virFileReadValueInt;
+virFileReadValueScaledInt;
+virFileReadValueString;
 virFileReadValueUint;
 virFileRelLinkPointsTo;
 virFileRemove;
@@ -2643,20 +2645,6 @@ virTrimSpaces;
 virVasprintfInternal;
 
 
-# util/virsysfs.h
-virSysfsGetCpuValueBitmap;
-virSysfsGetCpuValueInt;
-virSysfsGetCpuValueString;
-virSysfsGetCpuValueUint;
-virSysfsGetNodeValueBitmap;
-virSysfsGetNodeValueString;
-virSysfsGetSystemPath;
-virSysfsGetValueBitmap;
-virSysfsGetValueInt;
-virSysfsGetValueString;
-virSysfsSetSystemPath;
-
-
 # util/virsysinfo.h
 virSysinfoBaseBoardDefClear;
 virSysinfoBIOSDefFree;

src/util/virfile.c

@@ -3799,24 +3799,36 @@ virFileComparePaths(const char *p1, const char *p2)
 
 /**
  * virFileReadValueInt:
- * @path: file to read from
  * @value: pointer to int to be filled in with the value
+ * @format, ...: file to read from
  *
- * Read int from @path and put it into @value.
+ * Read int from @format and put it into @value.
  *
  * Return -2 for non-existing file, -1 on other errors and 0 if everything went
  * fine.
  */
 int
-virFileReadValueInt(const char *path, int *value)
+virFileReadValueInt(int *value, const char *format, ...)
 {
+    int ret = -1;
     char *str = NULL;
+    char *path = NULL;
+    va_list ap;
 
-    if (!virFileExists(path))
-        return -2;
+    va_start(ap, format);
+    if (virVasprintf(&path, format, ap) < 0) {
+        va_end(ap);
+        goto cleanup;
+    }
+    va_end(ap);
 
-    if (virFileReadAll(path, INT_STRLEN_BOUND(*value), &str) < 0)
-        return -1;
+    if (!virFileExists(path)) {
+        ret = -2;
+        goto cleanup;
+    }
+
+    if (virFileReadAll(path, INT_BUFSIZE_BOUND(*value), &str) < 0)
+        goto cleanup;
 
     virStringTrimOptionalNewline(str);
 
@@ -3824,83 +3836,205 @@ virFileReadValueInt(const char *path, int *value)
         virReportError(VIR_ERR_INTERNAL_ERROR,
                        _("Invalid integer value '%s' in file '%s'"),
                        str, path);
-        return -1;
+        goto cleanup;
     }
 
+    ret = 0;
+ cleanup:
+    VIR_FREE(path);
     VIR_FREE(str);
-
-    return 0;
+    return ret;
 }
 
 
 /**
  * virFileReadValueUint:
- * @path: file to read from
- * @value: pointer to unsigned int to be filled in with the value
+ * @value: pointer to int to be filled in with the value
+ * @format, ...: file to read from
  *
- * Read int from @path and put it into @value.
+ * Read unsigned int from @format and put it into @value.
  *
  * Return -2 for non-existing file, -1 on other errors and 0 if everything went
  * fine.
  */
 int
-virFileReadValueUint(const char *path, unsigned int *value)
+virFileReadValueUint(unsigned int *value, const char *format, ...)
 {
+    int ret = -1;
     char *str = NULL;
+    char *path = NULL;
+    va_list ap;
 
-    if (!virFileExists(path))
-        return -2;
+    va_start(ap, format);
+    if (virVasprintf(&path, format, ap) < 0) {
+        va_end(ap);
+        goto cleanup;
+    }
+    va_end(ap);
 
-    if (virFileReadAll(path, INT_STRLEN_BOUND(*value), &str) < 0)
-        return -1;
+    if (!virFileExists(path)) {
+        ret = -2;
+        goto cleanup;
+    }
+
+    if (virFileReadAll(path, INT_BUFSIZE_BOUND(*value), &str) < 0)
+        goto cleanup;
 
     virStringTrimOptionalNewline(str);
 
-    if (virStrToLong_uip(str, NULL, 10, value)) {
+    if (virStrToLong_uip(str, NULL, 10, value) < 0) {
         virReportError(VIR_ERR_INTERNAL_ERROR,
                        _("Invalid unsigned integer value '%s' in file '%s'"),
                        str, path);
-        return -1;
+        goto cleanup;
     }
 
+    ret = 0;
+ cleanup:
+    VIR_FREE(path);
     VIR_FREE(str);
+    return ret;
+}
 
-    return 0;
+
+/**
+ * virFileReadValueScaledInt:
+ * @value: pointer to unsigned long long int to be filled in with the value
+ * @format, ...: file to read from
+ *
+ * Read unsigned scaled int from @format and put it into @value.
+ *
+ * Return -2 for non-existing file, -1 on other errors and 0 if everything went
+ * fine.
+ */
+int
+virFileReadValueScaledInt(unsigned long long *value, const char *format, ...)
+{
+    int ret = -1;
+    char *str = NULL;
+    char *endp = NULL;
+    char *path = NULL;
+    va_list ap;
+
+    va_start(ap, format);
+    if (virVasprintf(&path, format, ap) < 0) {
+        va_end(ap);
+        goto cleanup;
+    }
+    va_end(ap);
+
+    if (!virFileExists(path)) {
+        ret = -2;
+        goto cleanup;
+    }
+
+    if (virFileReadAll(path, INT_BUFSIZE_BOUND(*value), &str) < 0)
+        goto cleanup;
+
+    virStringTrimOptionalNewline(str);
+
+    if (virStrToLong_ullp(str, &endp, 10, value) < 0) {
+        virReportError(VIR_ERR_INTERNAL_ERROR,
+                       _("Invalid unsigned scaled integer value '%s' in file '%s'"),
+                       str, path);
+        goto cleanup;
+    }
+
+    ret = virScaleInteger(value, endp, 1024, ULLONG_MAX);
+ cleanup:
+    VIR_FREE(path);
+    VIR_FREE(str);
+    return ret;
 }
 
+/* Arbitrarily sized number, feel free to change, but the function should be
+ * used for small, interface-like files, so it should not be huge (subjective) */
+#define VIR_FILE_READ_VALUE_STRING_MAX 4096
+
 /**
  * virFileReadValueBitmap:
- * @path: file to read from
- * @value: double pointer to virBitmap to be allocated and filled in with the
- * value
+ * @value: pointer to virBitmapPtr to be allocated and filled in with the value
+ * @format, ...: file to read from
  *
- * Read int from @path and put it into @value.
+ * Read int from @format and put it into @value.
  *
  * Return -2 for non-existing file, -1 on other errors and 0 if everything went
  * fine.
  */
 int
-virFileReadValueBitmap(const char *path,
-                       int maxlen,
-                       virBitmapPtr *value)
+virFileReadValueBitmap(virBitmapPtr *value, const char *format, ...)
 {
-    char *buf = NULL;
     int ret = -1;
+    char *str = NULL;
+    char *path = NULL;
+    va_list ap;
 
-    if (!virFileExists(path))
-        return -2;
+    va_start(ap, format);
+    if (virVasprintf(&path, format, ap) < 0) {
+        va_end(ap);
+        goto cleanup;
+    }
+    va_end(ap);
 
-    if (virFileReadAll(path, maxlen, &buf) < 0)
+    if (!virFileExists(path)) {
+        ret = -2;
         goto cleanup;
+    }
 
-    virStringTrimOptionalNewline(buf);
+    if (virFileReadAll(path, VIR_FILE_READ_VALUE_STRING_MAX, &str) < 0)
+        goto cleanup;
 
-    *value = virBitmapParseUnlimited(buf);
+    virStringTrimOptionalNewline(str);
+
+    *value = virBitmapParseUnlimited(str);
     if (!*value)
         goto cleanup;
 
     ret = 0;
  cleanup:
-    VIR_FREE(buf);
+    VIR_FREE(path);
+    VIR_FREE(str);
+    return ret;
+}
+
+/**
+ * virFileReadValueString:
+ * @value: pointer to char * to be allocated and filled in with the value
+ * @format, ...: file to read from
+ *
+ * Read string from @format and put it into @value.  Don't get this mixed with
+ * virFileReadAll().  This function is a wrapper over it with the behaviour
+ * aligned to other virFileReadValue* functions
+ *
+ * Return -2 for non-existing file, -1 on other errors and 0 if everything went
+ * fine.
+ */
+int
+virFileReadValueString(char **value, const char *format, ...)
+{
+    int ret = -1;
+    char *str = NULL;
+    char *path = NULL;
+    va_list ap;
+
+    va_start(ap, format);
+    if (virVasprintf(&path, format, ap) < 0) {
+        va_end(ap);
+        goto cleanup;
+    }
+    va_end(ap);
+
+    if (!virFileExists(path)) {
+        ret = -2;
+        goto cleanup;
+    }
+
+    ret = virFileReadAll(path, VIR_FILE_READ_VALUE_STRING_MAX, value);
+
+    if (*value)
+        virStringTrimOptionalNewline(*value);
+ cleanup:
+    VIR_FREE(path);
+    VIR_FREE(str);
     return ret;
 }

src/util/virfile.h

@@ -336,8 +336,16 @@ int virFileCopyACLs(const char *src,
 
 int virFileComparePaths(const char *p1, const char *p2);
 
-int virFileReadValueInt(const char *path, int *value);
-int virFileReadValueUint(const char *path, unsigned int *value);
-int virFileReadValueBitmap(const char *path, int maxlen, virBitmapPtr *value);
+int virFileReadValueInt(int *value, const char *format, ...)
+ ATTRIBUTE_FMT_PRINTF(2, 3);
+int virFileReadValueUint(unsigned int *value, const char *format, ...)
+ ATTRIBUTE_FMT_PRINTF(2, 3);
+int virFileReadValueBitmap(virBitmapPtr *value, const char *format, ...)
+ ATTRIBUTE_FMT_PRINTF(2, 3);
+int virFileReadValueScaledInt(unsigned long long *value, const char *format, ...)
+ ATTRIBUTE_FMT_PRINTF(2, 3);
+int virFileReadValueString(char **value, const char *format, ...)
+ ATTRIBUTE_FMT_PRINTF(2, 3);
+
 
 #endif /* __VIR_FILE_H */

src/util/virhostcpu.c

@@ -56,7 +56,6 @@
 #include "virfile.h"
 #include "virtypedparam.h"
 #include "virstring.h"
-#include "virsysfs.h"
 #include "virnuma.h"
 #include "virlog.h"
 
@@ -192,6 +191,7 @@ virHostCPUGetStatsFreeBSD(int cpuNum,
 #ifdef __linux__
 # define CPUINFO_PATH "/proc/cpuinfo"
 # define PROCSTAT_PATH "/proc/stat"
+# define SYSFS_SYSTEM_PATH "/sys/devices/system"
 # define VIR_HOST_CPU_MASK_LEN 1024
 
 # define LINUX_NB_CPU_STATS 4
@@ -205,7 +205,9 @@ virHostCPUCountThreadSiblings(unsigned int cpu)
     char *str = NULL;
     size_t i;
 
-    rv = virSysfsGetCpuValueString(cpu, "topology/thread_siblings", &str);
+    rv = virFileReadValueString(&str,
+                                "%s/cpu/cpu%u/topology/thread_siblings",
+                                SYSFS_SYSTEM_PATH, cpu);
     if (rv == -2) {
         ret = 1;
         goto cleanup;
@@ -227,9 +229,9 @@ int
 virHostCPUGetSocket(unsigned int cpu, unsigned int *socket)
 {
     int tmp;
-    int ret = virSysfsGetCpuValueInt(cpu,
-                                     "topology/physical_package_id",
-                                     &tmp);
+    int ret = virFileReadValueInt(&tmp,
+                                  "%s/cpu/cpu%u/topology/physical_package_id",
+                                  SYSFS_SYSTEM_PATH, cpu);
 
     /* If the file is not there, it's 0 */
     if (ret == -2)
@@ -251,7 +253,9 @@ virHostCPUGetSocket(unsigned int cpu, unsigned int *socket)
 int
 virHostCPUGetCore(unsigned int cpu, unsigned int *core)
 {
-    int ret = virSysfsGetCpuValueUint(cpu, "topology/core_id", core);
+    int ret = virFileReadValueUint(core,
+                                   "%s/cpu/cpu%u/topology/core_id",
+                                   SYSFS_SYSTEM_PATH, cpu);
 
     /* If the file is not there, it's 0 */
     if (ret == -2)
@@ -268,7 +272,9 @@ virHostCPUGetSiblingsList(unsigned int cpu)
     virBitmapPtr ret = NULL;
     int rv = -1;
 
-    rv = virSysfsGetCpuValueBitmap(cpu, "topology/thread_siblings_list", &ret);
+    rv = virFileReadValueBitmap(&ret,
+                                "%s/cpu/cpu%u/topology/thread_siblings_list",
+                                SYSFS_SYSTEM_PATH, cpu);
     if (rv == -2) {
         /* If the file doesn't exist, the threadis its only sibling */
         ret = virBitmapNew(cpu + 1);
@@ -615,7 +621,7 @@ virHostCPUGetInfoPopulateLinux(FILE *cpuinfo,
     /* OK, we've parsed clock speed out of /proc/cpuinfo. Get the
      * core, node, socket, thread and topology information from /sys
      */
-    if (virAsprintf(&sysfs_nodedir, "%s/node", virSysfsGetSystemPath()) < 0)
+    if (virAsprintf(&sysfs_nodedir, "%s/node", SYSFS_SYSTEM_PATH) < 0)
         goto cleanup;
 
     if (virDirOpenQuiet(&nodedir, sysfs_nodedir) < 0) {
@@ -659,8 +665,8 @@ virHostCPUGetInfoPopulateLinux(FILE *cpuinfo,
 
         (*nodes)++;
 
-        if (virAsprintf(&sysfs_cpudir, "%s/node/%s",
-                        virSysfsGetSystemPath(), nodedirent->d_name) < 0)
+        if (virAsprintf(&sysfs_cpudir, "%s/node/%s", SYSFS_SYSTEM_PATH,
+                        nodedirent->d_name) < 0)
             goto cleanup;
 
         if ((nodecpus = virHostCPUParseNode(sysfs_cpudir, arch,
@@ -694,7 +700,7 @@ virHostCPUGetInfoPopulateLinux(FILE *cpuinfo,
  fallback:
     VIR_FREE(sysfs_cpudir);
 
-    if (virAsprintf(&sysfs_cpudir, "%s/cpu", virSysfsGetSystemPath()) < 0)
+    if (virAsprintf(&sysfs_cpudir, "%s/cpu", SYSFS_SYSTEM_PATH) < 0)
         goto cleanup;
 
     if ((nodecpus = virHostCPUParseNode(sysfs_cpudir, arch,
@@ -841,7 +847,7 @@ virHostCPUParseCountLinux(void)
     char *tmp;
     int ret = -1;
 
-    if (virSysfsGetValueString("cpu/present", &str) < 0)
+    if (virFileReadValueString(&str, "%s/cpu/present", SYSFS_SYSTEM_PATH) < 0)
         return -1;
 
     tmp = str;
@@ -866,8 +872,9 @@ int
 virHostCPUGetOnline(unsigned int cpu, bool *online)
 {
     unsigned int tmp = 0;
-    int ret = virSysfsGetCpuValueUint(cpu, "online", &tmp);
-
+    int ret = virFileReadValueUint(&tmp,
+                                   "%s/cpu/cpu%u/online",
+                                   SYSFS_SYSTEM_PATH, cpu);
 
     /* If the file is not there, it's online (doesn't support offlining) */
     if (ret == -2)
@@ -1032,7 +1039,7 @@ virHostCPUGetPresentBitmap(void)
 #ifdef __linux__
     virBitmapPtr ret = NULL;
 
-    virSysfsGetValueBitmap("cpu/present", &ret);
+    virFileReadValueBitmap(&ret, "%s/cpu/present", SYSFS_SYSTEM_PATH);
 
     return ret;
 #else
@@ -1048,7 +1055,7 @@ virHostCPUGetOnlineBitmap(void)
 #ifdef __linux__
     virBitmapPtr ret = NULL;
 
-    virSysfsGetValueBitmap("cpu/online", &ret);
+    virFileReadValueBitmap(&ret, "%s/cpu/online", SYSFS_SYSTEM_PATH);
 
     return ret;
 #else

src/util/virsysfs.c

-/*
- * virsysfs.c: Helper functions for manipulating sysfs files
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library.  If not, see
- * <http://www.gnu.org/licenses/>.
- *
- * Author: Martin Kletzander <mkletzan@redhat.com>
- */
-
-#include <config.h>
-
-#include "internal.h"
-
-#include "virsysfspriv.h"
-
-#include "viralloc.h"
-#include "virfile.h"
-#include "virlog.h"
-#include "virstring.h"
-
-#define VIR_FROM_THIS VIR_FROM_NONE
-
-VIR_LOG_INIT("util.sysfs");
-
-
-#define VIR_SYSFS_VALUE_MAXLEN 8192
-#define SYSFS_SYSTEM_PATH "/sys/devices/system"
-
-static const char *sysfs_system_path = SYSFS_SYSTEM_PATH;
-
-
-void virSysfsSetSystemPath(const char *path)
-{
-    if (path)
-        sysfs_system_path = path;
-    else
-        sysfs_system_path = SYSFS_SYSTEM_PATH;
-}
-
-
-const char *
-virSysfsGetSystemPath(void)
-{
-    return sysfs_system_path;
-}
-
-int
-virSysfsGetValueInt(const char *file,
-                    int *value)
-{
-    char *path = NULL;
-    int ret = -1;
-
-    if (virAsprintf(&path, "%s/%s", sysfs_system_path, file) < 0)
-        return -1;
-
-    ret = virFileReadValueInt(path, value);
-
-    VIR_FREE(path);
-    return ret;
-}
-
-int
-virSysfsGetValueString(const char *file,
-                       char **value)
-{
-    char *path = NULL;
-    int ret = -1;
-
-    if (virAsprintf(&path, "%s/%s", sysfs_system_path, file) < 0)
-        return -1;
-
-    if (!virFileExists(path)) {
-        ret = -2;
-        goto cleanup;
-    }
-
-    if (virFileReadAll(path, VIR_SYSFS_VALUE_MAXLEN, value) < 0)
-        goto cleanup;
-
-    virStringTrimOptionalNewline(*value);
-
-    ret = 0;
- cleanup:
-    VIR_FREE(path);
-    return ret;
-}
-
-int
-virSysfsGetValueBitmap(const char *file,
-                       virBitmapPtr *value)
-{
-    char *path = NULL;
-    int ret = -1;
-
-    if (virAsprintf(&path, "%s/%s", sysfs_system_path, file) < 0)
-        return -1;
-
-    ret = virFileReadValueBitmap(path, VIR_SYSFS_VALUE_MAXLEN, value);
-    VIR_FREE(path);
-    return ret;
-}
-
-int
-virSysfsGetCpuValueInt(unsigned int cpu,
-                       const char *file,
-                       int *value)
-{
-    char *path = NULL;
-    int ret = -1;
-
-    if (virAsprintf(&path, "%s/cpu/cpu%u/%s", sysfs_system_path, cpu, file) < 0)
-        return -1;
-
-    ret = virFileReadValueInt(path, value);
-
-    VIR_FREE(path);
-    return ret;
-}
-
-
-int
-virSysfsGetCpuValueUint(unsigned int cpu,
-                        const char *file,
-                        unsigned int *value)
-{
-    char *path = NULL;
-    int ret = -1;
-
-    if (virAsprintf(&path, "%s/cpu/cpu%u/%s", sysfs_system_path, cpu, file) < 0)
-        return -1;
-
-    ret = virFileReadValueUint(path, value);
-
-    VIR_FREE(path);
-    return ret;
-}
-
-
-int
-virSysfsGetCpuValueString(unsigned int cpu,
-                          const char *file,
-                          char **value)
-{
-    char *path = NULL;
-    int ret = -1;
-
-    if (virAsprintf(&path, "%s/cpu/cpu%u/%s", sysfs_system_path, cpu, file) < 0)
-        return -1;
-
-    if (!virFileExists(path)) {
-        ret = -2;
-        goto cleanup;
-    }
-
-    if (virFileReadAll(path, VIR_SYSFS_VALUE_MAXLEN, value) < 0)
-        goto cleanup;
-
-    ret = 0;
- cleanup:
-    VIR_FREE(path);
-    return ret;
-}
-
-int
-virSysfsGetCpuValueBitmap(unsigned int cpu,
-                          const char *file,
-                          virBitmapPtr *value)
-{
-    char *path = NULL;
-    int ret = -1;
-
-    if (virAsprintf(&path, "%s/cpu/cpu%u/%s", sysfs_system_path, cpu, file) < 0)
-        return -1;
-
-    ret = virFileReadValueBitmap(path, VIR_SYSFS_VALUE_MAXLEN, value);
-    VIR_FREE(path);
-    return ret;
-}
-
-int
-virSysfsGetNodeValueString(unsigned int node,
-                           const char *file,
-                           char **value)
-{
-    char *path = NULL;
-    int ret = -1;
-
-    if (virAsprintf(&path, "%s/node/node%u/%s", sysfs_system_path, node, file) < 0)
-        return -1;
-
-    if (!virFileExists(path)) {
-        ret = -2;
-        goto cleanup;
-    }
-
-    if (virFileReadAll(path, VIR_SYSFS_VALUE_MAXLEN, value) < 0)
-        goto cleanup;
-
-    ret = 0;
- cleanup:
-    VIR_FREE(path);
-    return ret;
-}
-
-int
-virSysfsGetNodeValueBitmap(unsigned int node,
-                           const char *file,
-                           virBitmapPtr *value)
-{
-    char *path = NULL;
-    int ret = -1;
-
-    if (virAsprintf(&path, "%s/node/node%u/%s", sysfs_system_path, node, file) < 0)
-        return -1;
-
-    ret = virFileReadValueBitmap(path, VIR_SYSFS_VALUE_MAXLEN, value);
-    VIR_FREE(path);
-    return ret;
-}

src/util/virsysfs.h

-/*
- * virsysfs.h: Helper functions for manipulating sysfs files
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library.  If not, see
- * <http://www.gnu.org/licenses/>.
- *
- * Author: Martin Kletzander <mkletzan@redhat.com>
- */
-
-#ifndef __VIR_SYSFS_H__
-# define __VIR_SYSFS_H__
-
-# include "internal.h"
-# include "virbitmap.h"
-
-const char * virSysfsGetSystemPath(void);
-
-int
-virSysfsGetValueInt(const char *file,
-                    int *value);
-
-int
-virSysfsGetValueString(const char *file,
-                       char **value);
-
-int
-virSysfsGetValueBitmap(const char *file,
-                       virBitmapPtr *value);
-
-int
-virSysfsGetCpuValueInt(unsigned int cpu,
-                       const char *file,
-                       int *value);
-int
-virSysfsGetCpuValueUint(unsigned int cpu,
-                        const char *file,
-                        unsigned int *value);
-
-int
-virSysfsGetCpuValueString(unsigned int cpu,
-                          const char *file,
-                          char **value);
-
-int
-virSysfsGetCpuValueBitmap(unsigned int cpu,
-                          const char *file,
-                          virBitmapPtr *value);
-
-int
-virSysfsGetNodeValueString(unsigned int node,
-                           const char *file,
-                           char **value);
-
-int
-virSysfsGetNodeValueBitmap(unsigned int cpu,
-                           const char *file,
-                           virBitmapPtr *value);
-
-#endif /* __VIR_SYSFS_H__*/

src/util/virsysfspriv.h

-/*
- * virsysfspriv.h: Helper functions for manipulating sysfs files
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library.  If not, see
- * <http://www.gnu.org/licenses/>.
- *
- * Author: Martin Kletzander <mkletzan@redhat.com>
- */
-
-#ifndef __VIR_SYSFS_PRIV_H__
-# define __VIR_SYSFS_PRIV_H__
-
-# include "virsysfs.h"
-
-void virSysfsSetSystemPath(const char *path);
-
-#endif /* __VIR_SYSFS_PRIV_H__*/

tests/Makefile.am

@@ -930,7 +930,7 @@ virconftest_SOURCES = \
 virconftest_LDADD = $(LDADDS)
 
 virhostcputest_SOURCES = \
-	virhostcputest.c testutils.h testutils.c
+	virhostcputest.c testutils.h testutils.c virfilewrapper.c
 virhostcputest_LDADD = $(LDADDS)
 
 commandtest_SOURCES = \
@@ -1147,7 +1147,7 @@ virhostcpumock_la_LIBADD = $(MOCKLIBS_LIBS)
 
 if WITH_LINUX
 vircaps2xmltest_SOURCES = \
-	vircaps2xmltest.c testutils.h testutils.c
+	vircaps2xmltest.c testutils.h testutils.c virfilewrapper.c
 vircaps2xmltest_LDADD = $(LDADDS)
 
 virnumamock_la_SOURCES = \
@@ -1155,6 +1155,7 @@ virnumamock_la_SOURCES = \
 virnumamock_la_CFLAGS = $(AM_CFLAGS)
 virnumamock_la_LDFLAGS = $(MOCKLIBS_LDFLAGS)
 virnumamock_la_LIBADD = $(MOCKLIBS_LIBS)
+
 else ! WITH_LINUX
 EXTRA_DIST += vircaps2xmltest.c virnumamock.c virfilewrapper.c virfilewrapper.h
 endif ! WITH_LINUX

tests/vircaps2xmltest.c

@@ -25,7 +25,7 @@
 #include "testutils.h"
 #include "capabilities.h"
 #include "virbitmap.h"
-#include "virsysfspriv.h"
+#include "virfilewrapper.h"
 
 
 #define VIR_FROM_THIS VIR_FROM_NONE
@@ -52,7 +52,7 @@ test_virCapabilities(const void *opaque)
                     abs_srcdir, data->filename) < 0)
         goto cleanup;
 
-    virSysfsSetSystemPath(dir);
+    virFileWrapperAddPrefix("/sys/devices/system", dir);
     caps = virCapabilitiesNew(data->arch, data->offlineMigrate, data->liveMigrate);
 
     if (!caps)
@@ -61,7 +61,7 @@ test_virCapabilities(const void *opaque)
     if (virCapabilitiesInitNUMA(caps) < 0)
         goto cleanup;
 
-    virSysfsSetSystemPath(NULL);
+    virFileWrapperClearPrefixes();
 
     if (!(capsXML = virCapabilitiesFormatXML(caps)))
         goto cleanup;

tests/virhostcputest.c

@@ -8,12 +8,14 @@
 #include "testutils.h"
 #include "internal.h"
 #include "virhostcpupriv.h"
-#include "virsysfspriv.h"
 #include "virfile.h"
 #include "virstring.h"
+#include "virfilewrapper.h"
 
 #define VIR_FROM_THIS VIR_FROM_NONE
 
+#define SYSFS_SYSTEM_PATH "/sys/devices/system"
+
 #if !(defined __linux__)
 
 int
@@ -178,9 +180,9 @@ linuxTestHostCPU(const void *opaque)
         goto cleanup;
     }
 
-    virSysfsSetSystemPath(sysfs_prefix);
+    virFileWrapperAddPrefix(SYSFS_SYSTEM_PATH, sysfs_prefix);
     result = linuxTestCompareFiles(cpuinfo, data->arch, output);
-    virSysfsSetSystemPath(NULL);
+    virFileWrapperRemovePrefix(SYSFS_SYSTEM_PATH);
 
  cleanup:
     VIR_FREE(cpuinfo);

tests/virnumamock.c

 /*
- * virnumamock.c: Mock some virNuma functions using virsysfs
+ * virnumamock.c: Mock some virNuma functions using sysfs
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -24,10 +24,11 @@
 #include "virfile.h"
 #include "viralloc.h"
 #include "virstring.h"
-#include "virsysfspriv.h"
 
 #define VIR_FROM_THIS VIR_FROM_NONE
 
+#define SYSFS_SYSTEM_PATH "/sys/devices/system"
+
 static int numa_avail = -1;
 
 
@@ -42,7 +43,7 @@ virNumaIsAvailable(void)
     if (numa_avail < 0) {
         char *sysfs_node_path = NULL;
 
-        if (virAsprintfQuiet(&sysfs_node_path, "%s/node", virSysfsGetSystemPath()) < 0)
+        if (virAsprintfQuiet(&sysfs_node_path, "%s/node", SYSFS_SYSTEM_PATH) < 0)
             return false;
 
         numa_avail = virFileExists(sysfs_node_path);
@@ -68,7 +69,7 @@ virNumaGetMaxNode(void)
     int ret = -1;
     virBitmapPtr map = NULL;
 
-    if (virSysfsGetValueBitmap("node/online", &map) < 0)
+    if (virFileReadValueBitmap(&map, "%s/node/online", SYSFS_SYSTEM_PATH) < 0)
         return -1;
 
     ret = virBitmapLastSetBit(map);
@@ -82,7 +83,7 @@ virNumaNodeIsAvailable(int node)
     bool ret = false;
     virBitmapPtr map = NULL;
 
-    if (virSysfsGetValueBitmap("node/online", &map) < 0)
+    if (virFileReadValueBitmap(&map, "%s/node/online", SYSFS_SYSTEM_PATH) < 0)
         return false;
 
     ret = virBitmapIsBitSet(map, node);
@@ -117,7 +118,7 @@ virNumaGetDistances(int node ATTRIBUTE_UNUSED,
 }
 
 /*
- * TODO: Adapt virNumaGetHugePageInfo{Path,Dir} to use virsysfs so that the
+ * TODO: Adapt virNumaGetHugePageInfo{Path,Dir} to use sysfs so that the
  * paths can be modified and this function can be thrown away and instead we'd
  * have copied info from /sys (as we do with /sys/devices/system).
  */
@@ -177,7 +178,9 @@ virNumaGetNodeCPUs(int node, virBitmapPtr *cpus)
     int ret = -1;
     char *cpulist = NULL;
 
-    if (virSysfsGetNodeValueString(node, "cpulist", &cpulist) < 0)
+    if (virFileReadValueString(&cpulist,
+                               "%s/node/node%u/cpulist",
+                               SYSFS_SYSTEM_PATH, node) < 0)
         return -1;
 
     *cpus = virBitmapParseUnlimited(cpulist);