From ee42b5ce0b33986970f5c2fd4b676cddc0d6306c Mon Sep 17 00:00:00 2001 From: Max Reitz Date: Wed, 20 Aug 2014 19:59:35 +0200 Subject: [PATCH] qcow2: Add overlap-check.template option Being able to set the overlap-check option to a string and then refine it via the overlap-check.* options is a nice idea for the command line but does not work so well for non-flattened dicts. In that case, one can only specify either but not both, so add a field to overlap-check.* which does the same as directly specifying overlap-check but can be used in conjunction with the other fields in non-flattened dicts. Signed-off-by: Max Reitz Reviewed-by: Eric Blake Message-id: 1408557576-14574-4-git-send-email-mreitz@redhat.com Signed-off-by: Stefan Hajnoczi --- block/qcow2.c | 24 ++++++++++++++++++++++-- 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 @@ -405,6 +405,12 @@ static QemuOptsList qcow2_runtime_opts = { .help = "Selects which overlap checks to perform from a range of " "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, @@ -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"