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authorEmil Condrea2016-10-25 07:50:09 +0200
committerStefano Stabellini2016-10-29 02:52:48 +0200
commitf0021dba622f562d42982f4f4105a7e14ef7535c (patch)
tree3a216ed2e908a0ee97d38dc488cf93e2d624d736 /hw/xen/xen_pvdev.c
parentxen: Fix coding style warnings (diff)
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xen: Create a new file xen_pvdev.c
The purpose of the new file is to store generic functions shared by frontend and backends such as xenstore operations, xendevs. Signed-off-by: Quan Xu <quan.xu@intel.com> Signed-off-by: Emil Condrea <emilcondrea@gmail.com> Signed-off-by: Stefano Stabellini <sstabellini@kernel.org> Signed-off-by: Quan Xu <xuquan8@huawei.com> Acked-by: Anthony PERARD <anthony.perard@citrix.com>
Diffstat (limited to 'hw/xen/xen_pvdev.c')
-rw-r--r--hw/xen/xen_pvdev.c150
1 files changed, 150 insertions, 0 deletions
diff --git a/hw/xen/xen_pvdev.c b/hw/xen/xen_pvdev.c
new file mode 100644
index 0000000000..a1dc2bed4c
--- /dev/null
+++ b/hw/xen/xen_pvdev.c
@@ -0,0 +1,150 @@
+/*
+ * Xen para-virtualization device
+ *
+ * (c) 2008 Gerd Hoffmann <kraxel@redhat.com>
+ *
+ * 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 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/>
+ */
+
+#include "qemu/osdep.h"
+
+#include "hw/xen/xen_backend.h"
+#include "hw/xen/xen_pvdev.h"
+
+static int debug;
+/* ------------------------------------------------------------- */
+
+int xenstore_write_str(const char *base, const char *node, const char *val)
+{
+ char abspath[XEN_BUFSIZE];
+
+ snprintf(abspath, sizeof(abspath), "%s/%s", base, node);
+ if (!xs_write(xenstore, 0, abspath, val, strlen(val))) {
+ return -1;
+ }
+ return 0;
+}
+
+char *xenstore_read_str(const char *base, const char *node)
+{
+ char abspath[XEN_BUFSIZE];
+ unsigned int len;
+ char *str, *ret = NULL;
+
+ snprintf(abspath, sizeof(abspath), "%s/%s", base, node);
+ str = xs_read(xenstore, 0, abspath, &len);
+ if (str != NULL) {
+ /* move to qemu-allocated memory to make sure
+ * callers can savely g_free() stuff. */
+ ret = g_strdup(str);
+ free(str);
+ }
+ return ret;
+}
+
+int xenstore_write_int(const char *base, const char *node, int ival)
+{
+ char val[12];
+
+ snprintf(val, sizeof(val), "%d", ival);
+ return xenstore_write_str(base, node, val);
+}
+
+int xenstore_write_int64(const char *base, const char *node, int64_t ival)
+{
+ char val[21];
+
+ snprintf(val, sizeof(val), "%"PRId64, ival);
+ return xenstore_write_str(base, node, val);
+}
+
+int xenstore_read_int(const char *base, const char *node, int *ival)
+{
+ char *val;
+ int rc = -1;
+
+ val = xenstore_read_str(base, node);
+ if (val && 1 == sscanf(val, "%d", ival)) {
+ rc = 0;
+ }
+ g_free(val);
+ return rc;
+}
+
+int xenstore_read_uint64(const char *base, const char *node, uint64_t *uval)
+{
+ char *val;
+ int rc = -1;
+
+ val = xenstore_read_str(base, node);
+ if (val && 1 == sscanf(val, "%"SCNu64, uval)) {
+ rc = 0;
+ }
+ g_free(val);
+ return rc;
+}
+
+const char *xenbus_strstate(enum xenbus_state state)
+{
+ static const char *const name[] = {
+ [XenbusStateUnknown] = "Unknown",
+ [XenbusStateInitialising] = "Initialising",
+ [XenbusStateInitWait] = "InitWait",
+ [XenbusStateInitialised] = "Initialised",
+ [XenbusStateConnected] = "Connected",
+ [XenbusStateClosing] = "Closing",
+ [XenbusStateClosed] = "Closed",
+ };
+ return (state < ARRAY_SIZE(name)) ? name[state] : "INVALID";
+}
+
+/*
+ * msg_level:
+ * 0 == errors (stderr + logfile).
+ * 1 == informative debug messages (logfile only).
+ * 2 == noisy debug messages (logfile only).
+ * 3 == will flood your log (logfile only).
+ */
+void xen_be_printf(struct XenDevice *xendev, int msg_level,
+ const char *fmt, ...)
+{
+ va_list args;
+
+ if (xendev) {
+ if (msg_level > xendev->debug) {
+ return;
+ }
+ qemu_log("xen be: %s: ", xendev->name);
+ if (msg_level == 0) {
+ fprintf(stderr, "xen be: %s: ", xendev->name);
+ }
+ } else {
+ if (msg_level > debug) {
+ return;
+ }
+ qemu_log("xen be core: ");
+ if (msg_level == 0) {
+ fprintf(stderr, "xen be core: ");
+ }
+ }
+ va_start(args, fmt);
+ qemu_log_vprintf(fmt, args);
+ va_end(args);
+ if (msg_level == 0) {
+ va_start(args, fmt);
+ vfprintf(stderr, fmt, args);
+ va_end(args);
+ }
+ qemu_log_flush();
+}