diff options
| -rw-r--r-- | block/blkdebug.c | 96 | ||||
| -rw-r--r-- | qapi/block-core.json | 33 |
2 files changed, 125 insertions, 4 deletions
diff --git a/block/blkdebug.c b/block/blkdebug.c index 29ab7a3a8b..a5196e889d 100644 --- a/block/blkdebug.c +++ b/block/blkdebug.c @@ -39,6 +39,11 @@ typedef struct BDRVBlkdebugState { int state; int new_state; uint64_t align; + uint64_t max_transfer; + uint64_t opt_write_zero; + uint64_t max_write_zero; + uint64_t opt_discard; + uint64_t max_discard; /* For blkdebug_refresh_filename() */ char *config_file; @@ -343,6 +348,31 @@ static QemuOptsList runtime_opts = { .type = QEMU_OPT_SIZE, .help = "Required alignment in bytes", }, + { + .name = "max-transfer", + .type = QEMU_OPT_SIZE, + .help = "Maximum transfer size in bytes", + }, + { + .name = "opt-write-zero", + .type = QEMU_OPT_SIZE, + .help = "Optimum write zero alignment in bytes", + }, + { + .name = "max-write-zero", + .type = QEMU_OPT_SIZE, + .help = "Maximum write zero size in bytes", + }, + { + .name = "opt-discard", + .type = QEMU_OPT_SIZE, + .help = "Optimum discard alignment in bytes", + }, + { + .name = "max-discard", + .type = QEMU_OPT_SIZE, + .help = "Maximum discard size in bytes", + }, { /* end of list */ } }, }; @@ -354,6 +384,7 @@ static int blkdebug_open(BlockDriverState *bs, QDict *options, int flags, QemuOpts *opts; Error *local_err = NULL; int ret; + uint64_t align; opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort); qemu_opts_absorb_qdict(opts, options, &local_err); @@ -388,13 +419,61 @@ static int blkdebug_open(BlockDriverState *bs, QDict *options, int flags, bs->file->bs->supported_zero_flags; ret = -EINVAL; - /* Set request alignment */ + /* Set alignment overrides */ s->align = qemu_opt_get_size(opts, "align", 0); if (s->align && (s->align >= INT_MAX || !is_power_of_2(s->align))) { error_setg(errp, "Cannot meet constraints with align %" PRIu64, s->align); goto out; } + align = MAX(s->align, bs->file->bs->bl.request_alignment); + + s->max_transfer = qemu_opt_get_size(opts, "max-transfer", 0); + if (s->max_transfer && + (s->max_transfer >= INT_MAX || + !QEMU_IS_ALIGNED(s->max_transfer, align))) { + error_setg(errp, "Cannot meet constraints with max-transfer %" PRIu64, + s->max_transfer); + goto out; + } + + s->opt_write_zero = qemu_opt_get_size(opts, "opt-write-zero", 0); + if (s->opt_write_zero && + (s->opt_write_zero >= INT_MAX || + !QEMU_IS_ALIGNED(s->opt_write_zero, align))) { + error_setg(errp, "Cannot meet constraints with opt-write-zero %" PRIu64, + s->opt_write_zero); + goto out; + } + + s->max_write_zero = qemu_opt_get_size(opts, "max-write-zero", 0); + if (s->max_write_zero && + (s->max_write_zero >= INT_MAX || + !QEMU_IS_ALIGNED(s->max_write_zero, + MAX(s->opt_write_zero, align)))) { + error_setg(errp, "Cannot meet constraints with max-write-zero %" PRIu64, + s->max_write_zero); + goto out; + } + + s->opt_discard = qemu_opt_get_size(opts, "opt-discard", 0); + if (s->opt_discard && + (s->opt_discard >= INT_MAX || + !QEMU_IS_ALIGNED(s->opt_discard, align))) { + error_setg(errp, "Cannot meet constraints with opt-discard %" PRIu64, + s->opt_discard); + goto out; + } + + s->max_discard = qemu_opt_get_size(opts, "max-discard", 0); + if (s->max_discard && + (s->max_discard >= INT_MAX || + !QEMU_IS_ALIGNED(s->max_discard, + MAX(s->opt_discard, align)))) { + error_setg(errp, "Cannot meet constraints with max-discard %" PRIu64, + s->max_discard); + goto out; + } ret = 0; out: @@ -789,6 +868,21 @@ static void blkdebug_refresh_limits(BlockDriverState *bs, Error **errp) if (s->align) { bs->bl.request_alignment = s->align; } + if (s->max_transfer) { + bs->bl.max_transfer = s->max_transfer; + } + if (s->opt_write_zero) { + bs->bl.pwrite_zeroes_alignment = s->opt_write_zero; + } + if (s->max_write_zero) { + bs->bl.max_pwrite_zeroes = s->max_write_zero; + } + if (s->opt_discard) { + bs->bl.pdiscard_alignment = s->opt_discard; + } + if (s->max_discard) { + bs->bl.max_pdiscard = s->max_discard; + } } static int blkdebug_reopen_prepare(BDRVReopenState *reopen_state, diff --git a/qapi/block-core.json b/qapi/block-core.json index 52e3ecd505..6b974b952f 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -2434,8 +2434,33 @@ # # @config: filename of the configuration file # -# @align: required alignment for requests in bytes, -# must be power of 2, or 0 for default +# @align: required alignment for requests in bytes, must be +# positive power of 2, or 0 for default +# +# @max-transfer: maximum size for I/O transfers in bytes, must be +# positive multiple of @align and of the underlying +# file's request alignment (but need not be a power of +# 2), or 0 for default (since 2.10) +# +# @opt-write-zero: preferred alignment for write zero requests in bytes, +# must be positive multiple of @align and of the +# underlying file's request alignment (but need not be a +# power of 2), or 0 for default (since 2.10) +# +# @max-write-zero: maximum size for write zero requests in bytes, must be +# positive multiple of @align, of @opt-write-zero, and of +# the underlying file's request alignment (but need not +# be a power of 2), or 0 for default (since 2.10) +# +# @opt-discard: preferred alignment for discard requests in bytes, must +# be positive multiple of @align and of the underlying +# file's request alignment (but need not be a power of +# 2), or 0 for default (since 2.10) +# +# @max-discard: maximum size for discard requests in bytes, must be +# positive multiple of @align, of @opt-discard, and of +# the underlying file's request alignment (but need not +# be a power of 2), or 0 for default (since 2.10) # # @inject-error: array of error injection descriptions # @@ -2446,7 +2471,9 @@ { 'struct': 'BlockdevOptionsBlkdebug', 'data': { 'image': 'BlockdevRef', '*config': 'str', - '*align': 'int', + '*align': 'int', '*max-transfer': 'int32', + '*opt-write-zero': 'int32', '*max-write-zero': 'int32', + '*opt-discard': 'int32', '*max-discard': 'int32', '*inject-error': ['BlkdebugInjectErrorOptions'], '*set-state': ['BlkdebugSetStateOptions'] } } |