diff options
| -rw-r--r-- | block/qcow2.c | 24 | ||||
| -rw-r--r-- | block/qcow2.h | 1 |
2 files changed, 23 insertions, 2 deletions
diff --git a/block/qcow2.c b/block/qcow2.c index 744e0db7fc..778fc1ec13 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -406,6 +406,12 @@ static QemuOptsList qcow2_runtime_opts = { "templates (none, constant, cached, all)", }, { + .name = QCOW2_OPT_OVERLAP_TEMPLATE, + .type = QEMU_OPT_STRING, + .help = "Selects which overlap checks to perform from a range of " + "templates (none, constant, cached, all)", + }, + { .name = QCOW2_OPT_OVERLAP_MAIN_HEADER, .type = QEMU_OPT_BOOL, .help = "Check for unintended writes into the main qcow2 header", @@ -542,7 +548,7 @@ static int qcow2_open(BlockDriverState *bs, QDict *options, int flags, Error *local_err = NULL; uint64_t ext_end; uint64_t l1_vm_state_index; - const char *opt_overlap_check; + const char *opt_overlap_check, *opt_overlap_check_template; int overlap_check_template = 0; uint64_t l2_cache_size, refcount_cache_size; @@ -922,7 +928,21 @@ static int qcow2_open(BlockDriverState *bs, QDict *options, int flags, s->discard_passthrough[QCOW2_DISCARD_OTHER] = qemu_opt_get_bool(opts, QCOW2_OPT_DISCARD_OTHER, false); - opt_overlap_check = qemu_opt_get(opts, "overlap-check") ?: "cached"; + opt_overlap_check = qemu_opt_get(opts, QCOW2_OPT_OVERLAP); + opt_overlap_check_template = qemu_opt_get(opts, QCOW2_OPT_OVERLAP_TEMPLATE); + if (opt_overlap_check_template && opt_overlap_check && + strcmp(opt_overlap_check_template, opt_overlap_check)) + { + error_setg(errp, "Conflicting values for qcow2 options '" + QCOW2_OPT_OVERLAP "' ('%s') and '" QCOW2_OPT_OVERLAP_TEMPLATE + "' ('%s')", opt_overlap_check, opt_overlap_check_template); + ret = -EINVAL; + goto fail; + } + if (!opt_overlap_check) { + opt_overlap_check = opt_overlap_check_template ?: "cached"; + } + if (!strcmp(opt_overlap_check, "none")) { overlap_check_template = 0; } else if (!strcmp(opt_overlap_check, "constant")) { diff --git a/block/qcow2.h b/block/qcow2.h index 7b7b6a677c..7d61e615ff 100644 --- a/block/qcow2.h +++ b/block/qcow2.h @@ -83,6 +83,7 @@ #define QCOW2_OPT_DISCARD_SNAPSHOT "pass-discard-snapshot" #define QCOW2_OPT_DISCARD_OTHER "pass-discard-other" #define QCOW2_OPT_OVERLAP "overlap-check" +#define QCOW2_OPT_OVERLAP_TEMPLATE "overlap-check.template" #define QCOW2_OPT_OVERLAP_MAIN_HEADER "overlap-check.main-header" #define QCOW2_OPT_OVERLAP_ACTIVE_L1 "overlap-check.active-l1" #define QCOW2_OPT_OVERLAP_ACTIVE_L2 "overlap-check.active-l2" |