migration: Convert the file backend to the new QAPI syntax

Convert the file: URI to accept a FileMigrationArgs to be compatible
with the new migration QAPI.

Signed-off-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Message-ID: <20231023182053.8711-9-farosas@suse.de>

migration/file.c

@@ -36,20 +36,16 @@ int file_parse_offset(char *filespec, uint64_t *offsetp, Error **errp)
     return 0;
 }
 
-void file_start_outgoing_migration(MigrationState *s, const char *filespec,
-                                   Error **errp)
+void file_start_outgoing_migration(MigrationState *s,
+                                   FileMigrationArgs *file_args, Error **errp)
 {
-    g_autofree char *filename = g_strdup(filespec);
     g_autoptr(QIOChannelFile) fioc = NULL;
-    uint64_t offset = 0;
+    g_autofree char *filename = g_strdup(file_args->filename);
+    uint64_t offset = file_args->offset;
     QIOChannel *ioc;
 
     trace_migration_file_outgoing(filename);
 
-    if (file_parse_offset(filename, &offset, errp)) {
-        return;
-    }
-
     fioc = qio_channel_file_new_path(filename, O_CREAT | O_WRONLY | O_TRUNC,
                                      0600, errp);
     if (!fioc) {
@@ -73,19 +69,15 @@ static gboolean file_accept_incoming_migration(QIOChannel *ioc,
     return G_SOURCE_REMOVE;
 }
 
-void file_start_incoming_migration(const char *filespec, Error **errp)
+void file_start_incoming_migration(FileMigrationArgs *file_args, Error **errp)
 {
-    g_autofree char *filename = g_strdup(filespec);
+    g_autofree char *filename = g_strdup(file_args->filename);
     QIOChannelFile *fioc = NULL;
-    uint64_t offset = 0;
+    uint64_t offset = file_args->offset;
     QIOChannel *ioc;
 
     trace_migration_file_incoming(filename);
 
-    if (file_parse_offset(filename, &offset, errp)) {
-        return;
-    }
-
     fioc = qio_channel_file_new_path(filename, O_RDONLY, 0, errp);
     if (!fioc) {
         return;

migration/file.h

@@ -7,9 +7,12 @@
 
 #ifndef QEMU_MIGRATION_FILE_H
 #define QEMU_MIGRATION_FILE_H
-void file_start_incoming_migration(const char *filename, Error **errp);
 
-void file_start_outgoing_migration(MigrationState *s, const char *filename,
-                                   Error **errp);
+#include "qapi/qapi-types-migration.h"
+
+void file_start_incoming_migration(FileMigrationArgs *file_args, Error **errp);
+
+void file_start_outgoing_migration(MigrationState *s,
+                                   FileMigrationArgs *file_args, Error **errp);
 int file_parse_offset(char *filespec, uint64_t *offsetp, Error **errp);
 #endif

migration/migration.c

@@ -508,7 +508,6 @@ static bool migrate_uri_parse(const char *uri,
 
 static void qemu_start_incoming_migration(const char *uri, Error **errp)
 {
-    const char *p = NULL;
     g_autoptr(MigrationAddress) channel = NULL;
     MigrationIncomingState *mis = migration_incoming_get_current();
 
@@ -551,8 +550,8 @@ static void qemu_start_incoming_migration(const char *uri, Error **errp)
 #endif
     } else if (channel->transport == MIGRATION_ADDRESS_TYPE_EXEC) {
         exec_start_incoming_migration(channel->u.exec.args, errp);
-    } else if (strstart(uri, "file:", &p)) {
-        file_start_incoming_migration(p, errp);
+    } else if (channel->transport == MIGRATION_ADDRESS_TYPE_FILE) {
+        file_start_incoming_migration(&channel->u.file, errp);
     } else {
         error_setg(errp, "unknown migration protocol: %s", uri);
     }
@@ -1900,7 +1899,6 @@ void qmp_migrate(const char *uri, bool has_blk, bool blk,
     bool resume_requested;
     Error *local_err = NULL;
     MigrationState *s = migrate_get_current();
-    const char *p = NULL;
     g_autoptr(MigrationAddress) channel = NULL;
 
     /* URI is not suitable for migration? */
@@ -1940,8 +1938,8 @@ void qmp_migrate(const char *uri, bool has_blk, bool blk,
 #endif
     } else if (channel->transport == MIGRATION_ADDRESS_TYPE_EXEC) {
         exec_start_outgoing_migration(s, channel->u.exec.args, &local_err);
-    } else if (strstart(uri, "file:", &p)) {
-        file_start_outgoing_migration(s, p, &local_err);
+    } else if (channel->transport == MIGRATION_ADDRESS_TYPE_FILE) {
+        file_start_outgoing_migration(s, &channel->u.file, &local_err);
     } else {
         error_setg(&local_err, QERR_INVALID_PARAMETER_VALUE, "uri",
                    "a valid migration protocol");