[libvirt] [PATCH 2/2] util: rename qemuGetSchedInfo to virProcessGetSchedInfo

[Wang King]

qemuGetSchedInfo is more likely a process utility function, just rename it
to virProcessGetSchedInfo and move it to virprocess.c source file.
---
 src/libvirt_private.syms |  1 +
 src/qemu/qemu_driver.c   | 78 +-----------------------------------------------
 src/util/virprocess.c    | 75 ++++++++++++++++++++++++++++++++++++++++++++++
 src/util/virprocess.h    |  2 ++
 4 files changed, 79 insertions(+), 77 deletions(-)

diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 3681869..7f468dc 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -2381,6 +2381,7 @@ virProcessGetAffinity;
 virProcessGetMaxMemLock;
 virProcessGetNamespaces;
 virProcessGetPids;
+virProcessGetSchedInfo;
 virProcessGetStartTime;
 virProcessGetStat;
 virProcessKill;
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index a4aa5da..9e2fb7e 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -1302,82 +1302,6 @@ static char *qemuConnectGetCapabilities(virConnectPtr conn) {
     return xml;
 }
 
-
-static int
-qemuGetSchedInfo(unsigned long long *cpuWait,
-                 pid_t pid, pid_t tid)
-{
-    char *proc = NULL;
-    char *data = NULL;
-    char **lines = NULL;
-    size_t i;
-    int ret = -1;
-    double val;
-
-    *cpuWait = 0;
-
-    /* In general, we cannot assume pid_t fits in int; but /proc parsing
-     * is specific to Linux where int works fine.  */
-    if (tid)
-        ret = virAsprintf(&proc, "/proc/%d/task/%d/sched", (int)pid, (int)tid);
-    else
-        ret = virAsprintf(&proc, "/proc/%d/sched", (int)pid);
-    if (ret < 0)
-        goto cleanup;
-    ret = -1;
-
-    /* The file is not guaranteed to exist (needs CONFIG_SCHED_DEBUG) */
-    if (access(proc, R_OK) < 0) {
-        ret = 0;
-        goto cleanup;
-    }
-
-    if (virFileReadAll(proc, (1<<16), &data) < 0)
-        goto cleanup;
-
-    lines = virStringSplit(data, "\n", 0);
-    if (!lines)
-        goto cleanup;
-
-    for (i = 0; lines[i] != NULL; i++) {
-        const char *line = lines[i];
-
-        /* Needs CONFIG_SCHEDSTATS. The second check
-         * is the old name the kernel used in past */
-        if (STRPREFIX(line, "se.statistics.wait_sum") ||
-            STRPREFIX(line, "se.wait_sum")) {
-            line = strchr(line, ':');
-            if (!line) {
-                virReportError(VIR_ERR_INTERNAL_ERROR,
-                               _("Missing separator in sched info '%s'"),
-                               lines[i]);
-                goto cleanup;
-            }
-            line++;
-            while (*line == ' ')
-                line++;
-
-            if (virStrToDouble(line, NULL, &val) < 0) {
-                virReportError(VIR_ERR_INTERNAL_ERROR,
-                               _("Unable to parse sched info value '%s'"),
-                               line);
-                goto cleanup;
-            }
-
-            *cpuWait = (unsigned long long)(val * 1000000);
-            break;
-        }
-    }
-
-    ret = 0;
-
- cleanup:
-    VIR_FREE(data);
-    VIR_FREE(proc);
-    virStringListFree(lines);
-    return ret;
-}
-
 static int
 qemuDomainHelperGetVcpus(virDomainObjPtr vm,
                          virVcpuInfoPtr info,
@@ -1441,7 +1365,7 @@ qemuDomainHelperGetVcpus(virDomainObjPtr vm,
         }
 
         if (cpuwait) {
-            if (qemuGetSchedInfo(&(cpuwait[ncpuinfo]), vm->pid, vcpupid) < 0)
+            if (virProcessGetSchedInfo(vm->pid, vcpupid, &(cpuwait[ncpuinfo])) < 0)
                 return -1;
         }
 
diff --git a/src/util/virprocess.c b/src/util/virprocess.c
index 98f4b25..67e8cef 100644
--- a/src/util/virprocess.c
+++ b/src/util/virprocess.c
@@ -1488,3 +1488,78 @@ virProcessGetStat(pid_t pid, int tid,
     return 0;
 
 }
+
+int
+virProcessGetSchedInfo(pid_t pid, int tid,
+                      unsigned long long *cpuWait)
+{
+    char *proc = NULL;
+    char *data = NULL;
+    char **lines = NULL;
+    size_t i;
+    int ret = -1;
+    double val;
+
+    *cpuWait = 0;
+
+    /* In general, we cannot assume pid_t fits in int; but /proc parsing
+     * is specific to Linux where int works fine.  */
+    if (tid)
+        ret = virAsprintf(&proc, "/proc/%d/task/%d/sched", (int)pid, (int)tid);
+    else
+        ret = virAsprintf(&proc, "/proc/%d/sched", (int)pid);
+    if (ret < 0)
+        goto cleanup;
+    ret = -1;
+
+    /* The file is not guaranteed to exist (needs CONFIG_SCHED_DEBUG) */
+    if (access(proc, R_OK) < 0) {
+        ret = 0;
+        goto cleanup;
+    }
+
+    if (virFileReadAll(proc, (1<<16), &data) < 0)
+        goto cleanup;
+
+    lines = virStringSplit(data, "\n", 0);
+    if (!lines)
+        goto cleanup;
+
+    for (i = 0; lines[i] != NULL; i++) {
+        const char *line = lines[i];
+
+        /* Needs CONFIG_SCHEDSTATS. The second check
+         * is the old name the kernel used in past */
+        if (STRPREFIX(line, "se.statistics.wait_sum") ||
+            STRPREFIX(line, "se.wait_sum")) {
+            line = strchr(line, ':');
+            if (!line) {
+                virReportError(VIR_ERR_INTERNAL_ERROR,
+                               _("Missing separator in sched info '%s'"),
+                               lines[i]);
+                goto cleanup;
+            }
+            line++;
+            while (*line == ' ')
+                line++;
+
+            if (virStrToDouble(line, NULL, &val) < 0) {
+                virReportError(VIR_ERR_INTERNAL_ERROR,
+                               _("Unable to parse sched info value '%s'"),
+                               line);
+                goto cleanup;
+            }
+
+            *cpuWait = (unsigned long long)(val * 1000000);
+            break;
+        }
+    }
+
+    ret = 0;
+
+ cleanup:
+    VIR_FREE(data);
+    VIR_FREE(proc);
+    virStringListFree(lines);
+    return ret;
+}
diff --git a/src/util/virprocess.h b/src/util/virprocess.h
index 2a2b91d..ac80750 100644
--- a/src/util/virprocess.h
+++ b/src/util/virprocess.h
@@ -109,5 +109,7 @@ int virProcessNamespaceAvailable(unsigned int ns);
 int virProcessGetStat(pid_t pid, int tid,
                       unsigned long long *cpuTime,
                       int *lastCpu, long *vm_rss);
+int virProcessGetSchedInfo(pid_t pid, int tid,
+                           unsigned long long *cpuWait);
 
 #endif /* __VIR_PROCESS_H__ */
-- 
2.8.3