diff options
| -rw-r--r-- | qemu-io-cmds.c | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/qemu-io-cmds.c b/qemu-io-cmds.c index 53477e1e17..d6572a8585 100644 --- a/qemu-io-cmds.c +++ b/qemu-io-cmds.c @@ -1979,6 +1979,95 @@ static const cmdinfo_t map_cmd = { .oneline = "prints the allocated areas of a file", }; +static void reopen_help(void) +{ + printf( +"\n" +" Changes the open options of an already opened image\n" +"\n" +" Example:\n" +" 'reopen -o lazy-refcounts=on' - activates lazy refcount writeback on a qcow2 image\n" +"\n" +" -r, -- Reopen the image read-only\n" +" -c, -- Change the cache mode to the given value\n" +" -o, -- Changes block driver options (cf. 'open' command)\n" +"\n"); +} + +static int reopen_f(BlockBackend *blk, int argc, char **argv); + +static QemuOptsList reopen_opts = { + .name = "reopen", + .merge_lists = true, + .head = QTAILQ_HEAD_INITIALIZER(reopen_opts.head), + .desc = { + /* no elements => accept any params */ + { /* end of list */ } + }, +}; + +static const cmdinfo_t reopen_cmd = { + .name = "reopen", + .argmin = 0, + .argmax = -1, + .cfunc = reopen_f, + .args = "[-r] [-c cache] [-o options]", + .oneline = "reopens an image with new options", + .help = reopen_help, +}; + +static int reopen_f(BlockBackend *blk, int argc, char **argv) +{ + BlockDriverState *bs = blk_bs(blk); + QemuOpts *qopts; + QDict *opts; + int c; + int flags = bs->open_flags; + + BlockReopenQueue *brq; + Error *local_err = NULL; + + while ((c = getopt(argc, argv, "c:o:r")) != -1) { + switch (c) { + case 'c': + if (bdrv_parse_cache_flags(optarg, &flags) < 0) { + error_report("Invalid cache option: %s", optarg); + return 0; + } + break; + case 'o': + if (!qemu_opts_parse_noisily(&reopen_opts, optarg, 0)) { + qemu_opts_reset(&reopen_opts); + return 0; + } + break; + case 'r': + flags &= ~BDRV_O_RDWR; + break; + default: + qemu_opts_reset(&reopen_opts); + return qemuio_command_usage(&reopen_cmd); + } + } + + if (optind != argc) { + qemu_opts_reset(&reopen_opts); + return qemuio_command_usage(&reopen_cmd); + } + + qopts = qemu_opts_find(&reopen_opts, NULL); + opts = qopts ? qemu_opts_to_qdict(qopts, NULL) : NULL; + qemu_opts_reset(&reopen_opts); + + brq = bdrv_reopen_queue(NULL, bs, opts, flags); + bdrv_reopen_multiple(brq, &local_err); + if (local_err) { + error_report_err(local_err); + } + + return 0; +} + static int break_f(BlockBackend *blk, int argc, char **argv) { int ret; @@ -2266,6 +2355,7 @@ static void __attribute((constructor)) init_qemuio_commands(void) qemuio_add_command(&discard_cmd); qemuio_add_command(&alloc_cmd); qemuio_add_command(&map_cmd); + qemuio_add_command(&reopen_cmd); qemuio_add_command(&break_cmd); qemuio_add_command(&remove_break_cmd); qemuio_add_command(&resume_cmd); |