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blkdebug: Make required alignment configurable
The new 'align' option of blkdebug can be used in order to emulate backends with a required 4k alignment on hosts which only really require 512 byte alignment. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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2c9880c45e
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@ -364,6 +364,11 @@ static QemuOptsList runtime_opts = {
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.type = QEMU_OPT_STRING,
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.help = "[internal use only, will be removed]",
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},
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{
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.name = "align",
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.type = QEMU_OPT_SIZE,
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.help = "Required alignment in bytes",
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},
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{ /* end of list */ }
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},
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};
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@ -375,6 +380,7 @@ static int blkdebug_open(BlockDriverState *bs, QDict *options, int flags,
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QemuOpts *opts;
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Error *local_err = NULL;
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const char *config;
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uint64_t align;
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int ret;
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opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
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@ -403,6 +409,16 @@ static int blkdebug_open(BlockDriverState *bs, QDict *options, int flags,
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goto fail;
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}
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/* Set request alignment */
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align = qemu_opt_get_size(opts, "align", bs->request_alignment);
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if (align > 0 && align < INT_MAX && !(align & (align - 1))) {
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bs->request_alignment = align;
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} else {
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error_setg(errp, "Invalid alignment");
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ret = -EINVAL;
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goto fail;
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}
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ret = 0;
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fail:
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qemu_opts_del(opts);
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@ -4321,6 +4321,8 @@
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#
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# @config: #optional filename of the configuration file
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#
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# @align: #optional required alignment for requests in bytes
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#
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# @inject-error: #optional array of error injection descriptions
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#
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# @set-state: #optional array of state-change descriptions
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@ -4330,6 +4332,7 @@
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{ 'type': 'BlockdevOptionsBlkdebug',
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'data': { 'image': 'BlockdevRef',
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'*config': 'str',
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'*align': 'int',
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'*inject-error': ['BlkdebugInjectErrorOptions'],
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'*set-state': ['BlkdebugSetStateOptions'] } }
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