block.c (077e8e2018bce66aa1d1a87fa42beb24992c490f) block.c (8546632e610f9b906ff9d34ecba167915fc8157c)
1/*
2 * QEMU System Emulator block driver
3 *
4 * Copyright (c) 2003 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights

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3102 bs_entry->state.options = options;
3103 bs_entry->state.explicit_options = explicit_options;
3104 bs_entry->state.flags = flags;
3105
3106 /* This needs to be overwritten in bdrv_reopen_prepare() */
3107 bs_entry->state.perm = UINT64_MAX;
3108 bs_entry->state.shared_perm = 0;
3109
1/*
2 * QEMU System Emulator block driver
3 *
4 * Copyright (c) 2003 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights

--- 3093 unchanged lines hidden (view full) ---

3102 bs_entry->state.options = options;
3103 bs_entry->state.explicit_options = explicit_options;
3104 bs_entry->state.flags = flags;
3105
3106 /* This needs to be overwritten in bdrv_reopen_prepare() */
3107 bs_entry->state.perm = UINT64_MAX;
3108 bs_entry->state.shared_perm = 0;
3109
3110 /*
3111 * If keep_old_opts is false then it means that unspecified
3112 * options must be reset to their original value. We don't allow
3113 * resetting 'backing' but we need to know if the option is
3114 * missing in order to decide if we have to return an error.
3115 */
3116 if (!keep_old_opts) {
3117 bs_entry->state.backing_missing =
3118 !qdict_haskey(options, "backing") &&
3119 !qdict_haskey(options, "backing.driver");
3120 }
3121
3110 QLIST_FOREACH(child, &bs->children, next) {
3122 QLIST_FOREACH(child, &bs->children, next) {
3111 QDict *new_child_options;
3112 char *child_key_dot;
3123 QDict *new_child_options = NULL;
3124 bool child_keep_old = keep_old_opts;
3113
3114 /* reopen can only change the options of block devices that were
3115 * implicitly created and inherited options. For other (referenced)
3116 * block devices, a syntax like "backing.foo" results in an error. */
3117 if (child->bs->inherits_from != bs) {
3118 continue;
3119 }
3120
3125
3126 /* reopen can only change the options of block devices that were
3127 * implicitly created and inherited options. For other (referenced)
3128 * block devices, a syntax like "backing.foo" results in an error. */
3129 if (child->bs->inherits_from != bs) {
3130 continue;
3131 }
3132
3121 child_key_dot = g_strdup_printf("%s.", child->name);
3122 qdict_extract_subqdict(explicit_options, NULL, child_key_dot);
3123 qdict_extract_subqdict(options, &new_child_options, child_key_dot);
3124 g_free(child_key_dot);
3133 /* Check if the options contain a child reference */
3134 if (qdict_haskey(options, child->name)) {
3135 const char *childref = qdict_get_try_str(options, child->name);
3136 /*
3137 * The current child must not be reopened if the child
3138 * reference is null or points to a different node.
3139 */
3140 if (g_strcmp0(childref, child->bs->node_name)) {
3141 continue;
3142 }
3143 /*
3144 * If the child reference points to the current child then
3145 * reopen it with its existing set of options (note that
3146 * it can still inherit new options from the parent).
3147 */
3148 child_keep_old = true;
3149 } else {
3150 /* Extract child options ("child-name.*") */
3151 char *child_key_dot = g_strdup_printf("%s.", child->name);
3152 qdict_extract_subqdict(explicit_options, NULL, child_key_dot);
3153 qdict_extract_subqdict(options, &new_child_options, child_key_dot);
3154 g_free(child_key_dot);
3155 }
3125
3126 bdrv_reopen_queue_child(bs_queue, child->bs, new_child_options,
3156
3157 bdrv_reopen_queue_child(bs_queue, child->bs, new_child_options,
3127 child->role, options, flags, keep_old_opts);
3158 child->role, options, flags, child_keep_old);
3128 }
3129
3130 return bs_queue;
3131}
3132
3133BlockReopenQueue *bdrv_reopen_queue(BlockReopenQueue *bs_queue,
3134 BlockDriverState *bs,
3135 QDict *options, bool keep_old_opts)

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3398 "does not support reopening files", drv->format_name,
3399 bdrv_get_device_or_node_name(reopen_state->bs));
3400 ret = -1;
3401 goto error;
3402 }
3403
3404 drv_prepared = true;
3405
3159 }
3160
3161 return bs_queue;
3162}
3163
3164BlockReopenQueue *bdrv_reopen_queue(BlockReopenQueue *bs_queue,
3165 BlockDriverState *bs,
3166 QDict *options, bool keep_old_opts)

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3429 "does not support reopening files", drv->format_name,
3430 bdrv_get_device_or_node_name(reopen_state->bs));
3431 ret = -1;
3432 goto error;
3433 }
3434
3435 drv_prepared = true;
3436
3437 if (drv->supports_backing && reopen_state->backing_missing) {
3438 error_setg(errp, "backing is missing for '%s'",
3439 reopen_state->bs->node_name);
3440 ret = -EINVAL;
3441 goto error;
3442 }
3443
3406 /* Options that are not handled are only okay if they are unchanged
3407 * compared to the old state. It is expected that some options are only
3408 * used for the initial open, but not reopen (e.g. filename) */
3409 if (qdict_size(reopen_state->options)) {
3410 const QDictEntry *entry = qdict_first(reopen_state->options);
3411
3412 do {
3413 QObject *new = entry->value;

--- 2551 unchanged lines hidden --- 		3444 /* Options that are not handled are only okay if they are unchanged
3445 * compared to the old state. It is expected that some options are only
3446 * used for the initial open, but not reopen (e.g. filename) */
3447 if (qdict_size(reopen_state->options)) {
3448 const QDictEntry *entry = qdict_first(reopen_state->options);
3449
3450 do {
3451 QObject *new = entry->value;

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