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-rw-r--r--block/archipelago.c140
1 files changed, 138 insertions, 2 deletions
diff --git a/block/archipelago.c b/block/archipelago.c
index d91872d90e..297fc27529 100644
--- a/block/archipelago.c
+++ b/block/archipelago.c
@@ -15,6 +15,11 @@
* [,file.mport=<mapperd_port>[,file.vport=<vlmcd_port>]
* [,file.segment=<segment_name>]]
*
+ * or
+ *
+ * file=archipelago:<volumename>[/mport=<mapperd_port>[:vport=<vlmcd_port>][:
+ * segment=<segment_name>]]
+ *
* 'archipelago' is the protocol.
*
* 'mport' is the port number on which mapperd is listening. This is optional
@@ -32,11 +37,20 @@
* file.driver=archipelago,file.volume=my_vm_volume
* file.driver=archipelago,file.volume=my_vm_volume,file.mport=123
* file.driver=archipelago,file.volume=my_vm_volume,file.mport=123,
- * file.vport=1234
+ * file.vport=1234
* file.driver=archipelago,file.volume=my_vm_volume,file.mport=123,
- * file.vport=1234,file.segment=my_segment
+ * file.vport=1234,file.segment=my_segment
+ *
+ * or
+ *
+ * file=archipelago:my_vm_volume
+ * file=archipelago:my_vm_volume/mport=123
+ * file=archipelago:my_vm_volume/mport=123:vport=1234
+ * file=archipelago:my_vm_volume/mport=123:vport=1234:segment=my_segment
+ *
*/
+#include "qemu-common.h"
#include "block/block_int.h"
#include "qemu/error-report.h"
#include "qemu/thread.h"
@@ -309,6 +323,127 @@ static void qemu_archipelago_complete_aio(void *opaque)
g_free(reqdata);
}
+static void xseg_find_port(char *pstr, const char *needle, xport *aport)
+{
+ const char *a;
+ char *endptr = NULL;
+ unsigned long port;
+ if (strstart(pstr, needle, &a)) {
+ if (strlen(a) > 0) {
+ port = strtoul(a, &endptr, 10);
+ if (strlen(endptr)) {
+ *aport = -2;
+ return;
+ }
+ *aport = (xport) port;
+ }
+ }
+}
+
+static void xseg_find_segment(char *pstr, const char *needle,
+ char **segment_name)
+{
+ const char *a;
+ if (strstart(pstr, needle, &a)) {
+ if (strlen(a) > 0) {
+ *segment_name = g_strdup(a);
+ }
+ }
+}
+
+static void parse_filename_opts(const char *filename, Error **errp,
+ char **volume, char **segment_name,
+ xport *mport, xport *vport)
+{
+ const char *start;
+ char *tokens[4], *ds;
+ int idx;
+ xport lmport = NoPort, lvport = NoPort;
+
+ strstart(filename, "archipelago:", &start);
+
+ ds = g_strdup(start);
+ tokens[0] = strtok(ds, "/");
+ tokens[1] = strtok(NULL, ":");
+ tokens[2] = strtok(NULL, ":");
+ tokens[3] = strtok(NULL, "\0");
+
+ if (!strlen(tokens[0])) {
+ error_setg(errp, "volume name must be specified first");
+ g_free(ds);
+ return;
+ }
+
+ for (idx = 1; idx < 4; idx++) {
+ if (tokens[idx] != NULL) {
+ if (strstart(tokens[idx], "mport=", NULL)) {
+ xseg_find_port(tokens[idx], "mport=", &lmport);
+ }
+ if (strstart(tokens[idx], "vport=", NULL)) {
+ xseg_find_port(tokens[idx], "vport=", &lvport);
+ }
+ if (strstart(tokens[idx], "segment=", NULL)) {
+ xseg_find_segment(tokens[idx], "segment=", segment_name);
+ }
+ }
+ }
+
+ if ((lmport == -2) || (lvport == -2)) {
+ error_setg(errp, "mport and/or vport must be set");
+ g_free(ds);
+ return;
+ }
+ *volume = g_strdup(tokens[0]);
+ *mport = lmport;
+ *vport = lvport;
+ g_free(ds);
+}
+
+static void archipelago_parse_filename(const char *filename, QDict *options,
+ Error **errp)
+{
+ const char *start;
+ char *volume = NULL, *segment_name = NULL;
+ xport mport = NoPort, vport = NoPort;
+
+ if (qdict_haskey(options, ARCHIPELAGO_OPT_VOLUME)
+ || qdict_haskey(options, ARCHIPELAGO_OPT_SEGMENT)
+ || qdict_haskey(options, ARCHIPELAGO_OPT_MPORT)
+ || qdict_haskey(options, ARCHIPELAGO_OPT_VPORT)) {
+ error_setg(errp, "volume/mport/vport/segment and a file name may not"
+ " be specified at the same time");
+ return;
+ }
+
+ if (!strstart(filename, "archipelago:", &start)) {
+ error_setg(errp, "File name must start with 'archipelago:'");
+ return;
+ }
+
+ if (!strlen(start) || strstart(start, "/", NULL)) {
+ error_setg(errp, "volume name must be specified");
+ return;
+ }
+
+ parse_filename_opts(filename, errp, &volume, &segment_name, &mport, &vport);
+
+ if (volume) {
+ qdict_put(options, ARCHIPELAGO_OPT_VOLUME, qstring_from_str(volume));
+ g_free(volume);
+ }
+ if (segment_name) {
+ qdict_put(options, ARCHIPELAGO_OPT_SEGMENT,
+ qstring_from_str(segment_name));
+ g_free(segment_name);
+ }
+ if (mport != NoPort) {
+ qdict_put(options, ARCHIPELAGO_OPT_MPORT, qint_from_int(mport));
+ }
+ if (vport != NoPort) {
+ qdict_put(options, ARCHIPELAGO_OPT_VPORT, qint_from_int(vport));
+ }
+}
+
static QemuOptsList archipelago_runtime_opts = {
.name = "archipelago",
.head = QTAILQ_HEAD_INITIALIZER(archipelago_runtime_opts.head),
@@ -770,6 +905,7 @@ static BlockDriver bdrv_archipelago = {
.format_name = "archipelago",
.protocol_name = "archipelago",
.instance_size = sizeof(BDRVArchipelagoState),
+ .bdrv_parse_filename = archipelago_parse_filename,
.bdrv_file_open = qemu_archipelago_open,
.bdrv_close = qemu_archipelago_close,
.bdrv_getlength = qemu_archipelago_getlength,