diff options
Diffstat (limited to 'src/block/blkdebug.c')
| -rw-r--r-- | src/block/blkdebug.c | 812 |
1 files changed, 812 insertions, 0 deletions
diff --git a/src/block/blkdebug.c b/src/block/blkdebug.c new file mode 100644 index 0000000..dee3a0e --- /dev/null +++ b/src/block/blkdebug.c @@ -0,0 +1,812 @@ +/* + * Block protocol for I/O error injection + * + * Copyright (c) 2010 Kevin Wolf <kwolf@redhat.com> + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +#include "qemu-common.h" +#include "qemu/config-file.h" +#include "block/block_int.h" +#include "qemu/module.h" +#include "qapi/qmp/qbool.h" +#include "qapi/qmp/qdict.h" +#include "qapi/qmp/qint.h" +#include "qapi/qmp/qstring.h" +#include "sysemu/qtest.h" + +typedef struct BDRVBlkdebugState { + int state; + int new_state; + + QLIST_HEAD(, BlkdebugRule) rules[BLKDBG_EVENT_MAX]; + QSIMPLEQ_HEAD(, BlkdebugRule) active_rules; + QLIST_HEAD(, BlkdebugSuspendedReq) suspended_reqs; +} BDRVBlkdebugState; + +typedef struct BlkdebugAIOCB { + BlockAIOCB common; + QEMUBH *bh; + int ret; +} BlkdebugAIOCB; + +typedef struct BlkdebugSuspendedReq { + Coroutine *co; + char *tag; + QLIST_ENTRY(BlkdebugSuspendedReq) next; +} BlkdebugSuspendedReq; + +static const AIOCBInfo blkdebug_aiocb_info = { + .aiocb_size = sizeof(BlkdebugAIOCB), +}; + +enum { + ACTION_INJECT_ERROR, + ACTION_SET_STATE, + ACTION_SUSPEND, +}; + +typedef struct BlkdebugRule { + BlkDebugEvent event; + int action; + int state; + union { + struct { + int error; + int immediately; + int once; + int64_t sector; + } inject; + struct { + int new_state; + } set_state; + struct { + char *tag; + } suspend; + } options; + QLIST_ENTRY(BlkdebugRule) next; + QSIMPLEQ_ENTRY(BlkdebugRule) active_next; +} BlkdebugRule; + +static QemuOptsList inject_error_opts = { + .name = "inject-error", + .head = QTAILQ_HEAD_INITIALIZER(inject_error_opts.head), + .desc = { + { + .name = "event", + .type = QEMU_OPT_STRING, + }, + { + .name = "state", + .type = QEMU_OPT_NUMBER, + }, + { + .name = "errno", + .type = QEMU_OPT_NUMBER, + }, + { + .name = "sector", + .type = QEMU_OPT_NUMBER, + }, + { + .name = "once", + .type = QEMU_OPT_BOOL, + }, + { + .name = "immediately", + .type = QEMU_OPT_BOOL, + }, + { /* end of list */ } + }, +}; + +static QemuOptsList set_state_opts = { + .name = "set-state", + .head = QTAILQ_HEAD_INITIALIZER(set_state_opts.head), + .desc = { + { + .name = "event", + .type = QEMU_OPT_STRING, + }, + { + .name = "state", + .type = QEMU_OPT_NUMBER, + }, + { + .name = "new_state", + .type = QEMU_OPT_NUMBER, + }, + { /* end of list */ } + }, +}; + +static QemuOptsList *config_groups[] = { + &inject_error_opts, + &set_state_opts, + NULL +}; + +static const char *event_names[BLKDBG_EVENT_MAX] = { + [BLKDBG_L1_UPDATE] = "l1_update", + [BLKDBG_L1_GROW_ALLOC_TABLE] = "l1_grow.alloc_table", + [BLKDBG_L1_GROW_WRITE_TABLE] = "l1_grow.write_table", + [BLKDBG_L1_GROW_ACTIVATE_TABLE] = "l1_grow.activate_table", + + [BLKDBG_L2_LOAD] = "l2_load", + [BLKDBG_L2_UPDATE] = "l2_update", + [BLKDBG_L2_UPDATE_COMPRESSED] = "l2_update_compressed", + [BLKDBG_L2_ALLOC_COW_READ] = "l2_alloc.cow_read", + [BLKDBG_L2_ALLOC_WRITE] = "l2_alloc.write", + + [BLKDBG_READ_AIO] = "read_aio", + [BLKDBG_READ_BACKING_AIO] = "read_backing_aio", + [BLKDBG_READ_COMPRESSED] = "read_compressed", + + [BLKDBG_WRITE_AIO] = "write_aio", + [BLKDBG_WRITE_COMPRESSED] = "write_compressed", + + [BLKDBG_VMSTATE_LOAD] = "vmstate_load", + [BLKDBG_VMSTATE_SAVE] = "vmstate_save", + + [BLKDBG_COW_READ] = "cow_read", + [BLKDBG_COW_WRITE] = "cow_write", + + [BLKDBG_REFTABLE_LOAD] = "reftable_load", + [BLKDBG_REFTABLE_GROW] = "reftable_grow", + [BLKDBG_REFTABLE_UPDATE] = "reftable_update", + + [BLKDBG_REFBLOCK_LOAD] = "refblock_load", + [BLKDBG_REFBLOCK_UPDATE] = "refblock_update", + [BLKDBG_REFBLOCK_UPDATE_PART] = "refblock_update_part", + [BLKDBG_REFBLOCK_ALLOC] = "refblock_alloc", + [BLKDBG_REFBLOCK_ALLOC_HOOKUP] = "refblock_alloc.hookup", + [BLKDBG_REFBLOCK_ALLOC_WRITE] = "refblock_alloc.write", + [BLKDBG_REFBLOCK_ALLOC_WRITE_BLOCKS] = "refblock_alloc.write_blocks", + [BLKDBG_REFBLOCK_ALLOC_WRITE_TABLE] = "refblock_alloc.write_table", + [BLKDBG_REFBLOCK_ALLOC_SWITCH_TABLE] = "refblock_alloc.switch_table", + + [BLKDBG_CLUSTER_ALLOC] = "cluster_alloc", + [BLKDBG_CLUSTER_ALLOC_BYTES] = "cluster_alloc_bytes", + [BLKDBG_CLUSTER_FREE] = "cluster_free", + + [BLKDBG_FLUSH_TO_OS] = "flush_to_os", + [BLKDBG_FLUSH_TO_DISK] = "flush_to_disk", + + [BLKDBG_PWRITEV_RMW_HEAD] = "pwritev_rmw.head", + [BLKDBG_PWRITEV_RMW_AFTER_HEAD] = "pwritev_rmw.after_head", + [BLKDBG_PWRITEV_RMW_TAIL] = "pwritev_rmw.tail", + [BLKDBG_PWRITEV_RMW_AFTER_TAIL] = "pwritev_rmw.after_tail", + [BLKDBG_PWRITEV] = "pwritev", + [BLKDBG_PWRITEV_ZERO] = "pwritev_zero", + [BLKDBG_PWRITEV_DONE] = "pwritev_done", + + [BLKDBG_EMPTY_IMAGE_PREPARE] = "empty_image_prepare", +}; + +static int get_event_by_name(const char *name, BlkDebugEvent *event) +{ + int i; + + for (i = 0; i < BLKDBG_EVENT_MAX; i++) { + if (!strcmp(event_names[i], name)) { + *event = i; + return 0; + } + } + + return -1; +} + +struct add_rule_data { + BDRVBlkdebugState *s; + int action; +}; + +static int add_rule(void *opaque, QemuOpts *opts, Error **errp) +{ + struct add_rule_data *d = opaque; + BDRVBlkdebugState *s = d->s; + const char* event_name; + BlkDebugEvent event; + struct BlkdebugRule *rule; + + /* Find the right event for the rule */ + event_name = qemu_opt_get(opts, "event"); + if (!event_name) { + error_setg(errp, "Missing event name for rule"); + return -1; + } else if (get_event_by_name(event_name, &event) < 0) { + error_setg(errp, "Invalid event name \"%s\"", event_name); + return -1; + } + + /* Set attributes common for all actions */ + rule = g_malloc0(sizeof(*rule)); + *rule = (struct BlkdebugRule) { + .event = event, + .action = d->action, + .state = qemu_opt_get_number(opts, "state", 0), + }; + + /* Parse action-specific options */ + switch (d->action) { + case ACTION_INJECT_ERROR: + rule->options.inject.error = qemu_opt_get_number(opts, "errno", EIO); + rule->options.inject.once = qemu_opt_get_bool(opts, "once", 0); + rule->options.inject.immediately = + qemu_opt_get_bool(opts, "immediately", 0); + rule->options.inject.sector = qemu_opt_get_number(opts, "sector", -1); + break; + + case ACTION_SET_STATE: + rule->options.set_state.new_state = + qemu_opt_get_number(opts, "new_state", 0); + break; + + case ACTION_SUSPEND: + rule->options.suspend.tag = + g_strdup(qemu_opt_get(opts, "tag")); + break; + }; + + /* Add the rule */ + QLIST_INSERT_HEAD(&s->rules[event], rule, next); + + return 0; +} + +static void remove_rule(BlkdebugRule *rule) +{ + switch (rule->action) { + case ACTION_INJECT_ERROR: + case ACTION_SET_STATE: + break; + case ACTION_SUSPEND: + g_free(rule->options.suspend.tag); + break; + } + + QLIST_REMOVE(rule, next); + g_free(rule); +} + +static int read_config(BDRVBlkdebugState *s, const char *filename, + QDict *options, Error **errp) +{ + FILE *f = NULL; + int ret; + struct add_rule_data d; + Error *local_err = NULL; + + if (filename) { + f = fopen(filename, "r"); + if (f == NULL) { + error_setg_errno(errp, errno, "Could not read blkdebug config file"); + return -errno; + } + + ret = qemu_config_parse(f, config_groups, filename); + if (ret < 0) { + error_setg(errp, "Could not parse blkdebug config file"); + ret = -EINVAL; + goto fail; + } + } + + qemu_config_parse_qdict(options, config_groups, &local_err); + if (local_err) { + error_propagate(errp, local_err); + ret = -EINVAL; + goto fail; + } + + d.s = s; + d.action = ACTION_INJECT_ERROR; + qemu_opts_foreach(&inject_error_opts, add_rule, &d, &local_err); + if (local_err) { + error_propagate(errp, local_err); + ret = -EINVAL; + goto fail; + } + + d.action = ACTION_SET_STATE; + qemu_opts_foreach(&set_state_opts, add_rule, &d, &local_err); + if (local_err) { + error_propagate(errp, local_err); + ret = -EINVAL; + goto fail; + } + + ret = 0; +fail: + qemu_opts_reset(&inject_error_opts); + qemu_opts_reset(&set_state_opts); + if (f) { + fclose(f); + } + return ret; +} + +/* Valid blkdebug filenames look like blkdebug:path/to/config:path/to/image */ +static void blkdebug_parse_filename(const char *filename, QDict *options, + Error **errp) +{ + const char *c; + + /* Parse the blkdebug: prefix */ + if (!strstart(filename, "blkdebug:", &filename)) { + /* There was no prefix; therefore, all options have to be already + present in the QDict (except for the filename) */ + qdict_put(options, "x-image", qstring_from_str(filename)); + return; + } + + /* Parse config file path */ + c = strchr(filename, ':'); + if (c == NULL) { + error_setg(errp, "blkdebug requires both config file and image path"); + return; + } + + if (c != filename) { + QString *config_path; + config_path = qstring_from_substr(filename, 0, c - filename - 1); + qdict_put(options, "config", config_path); + } + + /* TODO Allow multi-level nesting and set file.filename here */ + filename = c + 1; + qdict_put(options, "x-image", qstring_from_str(filename)); +} + +static QemuOptsList runtime_opts = { + .name = "blkdebug", + .head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head), + .desc = { + { + .name = "config", + .type = QEMU_OPT_STRING, + .help = "Path to the configuration file", + }, + { + .name = "x-image", + .type = QEMU_OPT_STRING, + .help = "[internal use only, will be removed]", + }, + { + .name = "align", + .type = QEMU_OPT_SIZE, + .help = "Required alignment in bytes", + }, + { /* end of list */ } + }, +}; + +static int blkdebug_open(BlockDriverState *bs, QDict *options, int flags, + Error **errp) +{ + BDRVBlkdebugState *s = bs->opaque; + QemuOpts *opts; + Error *local_err = NULL; + const char *config; + uint64_t align; + int ret; + + opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort); + qemu_opts_absorb_qdict(opts, options, &local_err); + if (local_err) { + error_propagate(errp, local_err); + ret = -EINVAL; + goto out; + } + + /* Read rules from config file or command line options */ + config = qemu_opt_get(opts, "config"); + ret = read_config(s, config, options, errp); + if (ret) { + goto out; + } + + /* Set initial state */ + s->state = 1; + + /* Open the image file */ + bs->file = bdrv_open_child(qemu_opt_get(opts, "x-image"), options, "image", + bs, &child_file, false, &local_err); + if (local_err) { + ret = -EINVAL; + error_propagate(errp, local_err); + goto out; + } + + /* Set request alignment */ + align = qemu_opt_get_size(opts, "align", bs->request_alignment); + if (align > 0 && align < INT_MAX && !(align & (align - 1))) { + bs->request_alignment = align; + } else { + error_setg(errp, "Invalid alignment"); + ret = -EINVAL; + goto fail_unref; + } + + ret = 0; + goto out; + +fail_unref: + bdrv_unref_child(bs, bs->file); +out: + qemu_opts_del(opts); + return ret; +} + +static void error_callback_bh(void *opaque) +{ + struct BlkdebugAIOCB *acb = opaque; + qemu_bh_delete(acb->bh); + acb->common.cb(acb->common.opaque, acb->ret); + qemu_aio_unref(acb); +} + +static BlockAIOCB *inject_error(BlockDriverState *bs, + BlockCompletionFunc *cb, void *opaque, BlkdebugRule *rule) +{ + BDRVBlkdebugState *s = bs->opaque; + int error = rule->options.inject.error; + struct BlkdebugAIOCB *acb; + QEMUBH *bh; + bool immediately = rule->options.inject.immediately; + + if (rule->options.inject.once) { + QSIMPLEQ_REMOVE(&s->active_rules, rule, BlkdebugRule, active_next); + remove_rule(rule); + } + + if (immediately) { + return NULL; + } + + acb = qemu_aio_get(&blkdebug_aiocb_info, bs, cb, opaque); + acb->ret = -error; + + bh = aio_bh_new(bdrv_get_aio_context(bs), error_callback_bh, acb); + acb->bh = bh; + qemu_bh_schedule(bh); + + return &acb->common; +} + +static BlockAIOCB *blkdebug_aio_readv(BlockDriverState *bs, + int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, + BlockCompletionFunc *cb, void *opaque) +{ + BDRVBlkdebugState *s = bs->opaque; + BlkdebugRule *rule = NULL; + + QSIMPLEQ_FOREACH(rule, &s->active_rules, active_next) { + if (rule->options.inject.sector == -1 || + (rule->options.inject.sector >= sector_num && + rule->options.inject.sector < sector_num + nb_sectors)) { + break; + } + } + + if (rule && rule->options.inject.error) { + return inject_error(bs, cb, opaque, rule); + } + + return bdrv_aio_readv(bs->file->bs, sector_num, qiov, nb_sectors, + cb, opaque); +} + +static BlockAIOCB *blkdebug_aio_writev(BlockDriverState *bs, + int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, + BlockCompletionFunc *cb, void *opaque) +{ + BDRVBlkdebugState *s = bs->opaque; + BlkdebugRule *rule = NULL; + + QSIMPLEQ_FOREACH(rule, &s->active_rules, active_next) { + if (rule->options.inject.sector == -1 || + (rule->options.inject.sector >= sector_num && + rule->options.inject.sector < sector_num + nb_sectors)) { + break; + } + } + + if (rule && rule->options.inject.error) { + return inject_error(bs, cb, opaque, rule); + } + + return bdrv_aio_writev(bs->file->bs, sector_num, qiov, nb_sectors, + cb, opaque); +} + +static BlockAIOCB *blkdebug_aio_flush(BlockDriverState *bs, + BlockCompletionFunc *cb, void *opaque) +{ + BDRVBlkdebugState *s = bs->opaque; + BlkdebugRule *rule = NULL; + + QSIMPLEQ_FOREACH(rule, &s->active_rules, active_next) { + if (rule->options.inject.sector == -1) { + break; + } + } + + if (rule && rule->options.inject.error) { + return inject_error(bs, cb, opaque, rule); + } + + return bdrv_aio_flush(bs->file->bs, cb, opaque); +} + + +static void blkdebug_close(BlockDriverState *bs) +{ + BDRVBlkdebugState *s = bs->opaque; + BlkdebugRule *rule, *next; + int i; + + for (i = 0; i < BLKDBG_EVENT_MAX; i++) { + QLIST_FOREACH_SAFE(rule, &s->rules[i], next, next) { + remove_rule(rule); + } + } +} + +static void suspend_request(BlockDriverState *bs, BlkdebugRule *rule) +{ + BDRVBlkdebugState *s = bs->opaque; + BlkdebugSuspendedReq r; + + r = (BlkdebugSuspendedReq) { + .co = qemu_coroutine_self(), + .tag = g_strdup(rule->options.suspend.tag), + }; + + remove_rule(rule); + QLIST_INSERT_HEAD(&s->suspended_reqs, &r, next); + + if (!qtest_enabled()) { + printf("blkdebug: Suspended request '%s'\n", r.tag); + } + qemu_coroutine_yield(); + if (!qtest_enabled()) { + printf("blkdebug: Resuming request '%s'\n", r.tag); + } + + QLIST_REMOVE(&r, next); + g_free(r.tag); +} + +static bool process_rule(BlockDriverState *bs, struct BlkdebugRule *rule, + bool injected) +{ + BDRVBlkdebugState *s = bs->opaque; + + /* Only process rules for the current state */ + if (rule->state && rule->state != s->state) { + return injected; + } + + /* Take the action */ + switch (rule->action) { + case ACTION_INJECT_ERROR: + if (!injected) { + QSIMPLEQ_INIT(&s->active_rules); + injected = true; + } + QSIMPLEQ_INSERT_HEAD(&s->active_rules, rule, active_next); + break; + + case ACTION_SET_STATE: + s->new_state = rule->options.set_state.new_state; + break; + + case ACTION_SUSPEND: + suspend_request(bs, rule); + break; + } + return injected; +} + +static void blkdebug_debug_event(BlockDriverState *bs, BlkDebugEvent event) +{ + BDRVBlkdebugState *s = bs->opaque; + struct BlkdebugRule *rule, *next; + bool injected; + + assert((int)event >= 0 && event < BLKDBG_EVENT_MAX); + + injected = false; + s->new_state = s->state; + QLIST_FOREACH_SAFE(rule, &s->rules[event], next, next) { + injected = process_rule(bs, rule, injected); + } + s->state = s->new_state; +} + +static int blkdebug_debug_breakpoint(BlockDriverState *bs, const char *event, + const char *tag) +{ + BDRVBlkdebugState *s = bs->opaque; + struct BlkdebugRule *rule; + BlkDebugEvent blkdebug_event; + + if (get_event_by_name(event, &blkdebug_event) < 0) { + return -ENOENT; + } + + + rule = g_malloc(sizeof(*rule)); + *rule = (struct BlkdebugRule) { + .event = blkdebug_event, + .action = ACTION_SUSPEND, + .state = 0, + .options.suspend.tag = g_strdup(tag), + }; + + QLIST_INSERT_HEAD(&s->rules[blkdebug_event], rule, next); + + return 0; +} + +static int blkdebug_debug_resume(BlockDriverState *bs, const char *tag) +{ + BDRVBlkdebugState *s = bs->opaque; + BlkdebugSuspendedReq *r, *next; + + QLIST_FOREACH_SAFE(r, &s->suspended_reqs, next, next) { + if (!strcmp(r->tag, tag)) { + qemu_coroutine_enter(r->co, NULL); + return 0; + } + } + return -ENOENT; +} + +static int blkdebug_debug_remove_breakpoint(BlockDriverState *bs, + const char *tag) +{ + BDRVBlkdebugState *s = bs->opaque; + BlkdebugSuspendedReq *r, *r_next; + BlkdebugRule *rule, *next; + int i, ret = -ENOENT; + + for (i = 0; i < BLKDBG_EVENT_MAX; i++) { + QLIST_FOREACH_SAFE(rule, &s->rules[i], next, next) { + if (rule->action == ACTION_SUSPEND && + !strcmp(rule->options.suspend.tag, tag)) { + remove_rule(rule); + ret = 0; + } + } + } + QLIST_FOREACH_SAFE(r, &s->suspended_reqs, next, r_next) { + if (!strcmp(r->tag, tag)) { + qemu_coroutine_enter(r->co, NULL); + ret = 0; + } + } + return ret; +} + +static bool blkdebug_debug_is_suspended(BlockDriverState *bs, const char *tag) +{ + BDRVBlkdebugState *s = bs->opaque; + BlkdebugSuspendedReq *r; + + QLIST_FOREACH(r, &s->suspended_reqs, next) { + if (!strcmp(r->tag, tag)) { + return true; + } + } + return false; +} + +static int64_t blkdebug_getlength(BlockDriverState *bs) +{ + return bdrv_getlength(bs->file->bs); +} + +static int blkdebug_truncate(BlockDriverState *bs, int64_t offset) +{ + return bdrv_truncate(bs->file->bs, offset); +} + +static void blkdebug_refresh_filename(BlockDriverState *bs) +{ + QDict *opts; + const QDictEntry *e; + bool force_json = false; + + for (e = qdict_first(bs->options); e; e = qdict_next(bs->options, e)) { + if (strcmp(qdict_entry_key(e), "config") && + strcmp(qdict_entry_key(e), "x-image") && + strcmp(qdict_entry_key(e), "image") && + strncmp(qdict_entry_key(e), "image.", strlen("image."))) + { + force_json = true; + break; + } + } + + if (force_json && !bs->file->bs->full_open_options) { + /* The config file cannot be recreated, so creating a plain filename + * is impossible */ + return; + } + + if (!force_json && bs->file->bs->exact_filename[0]) { + snprintf(bs->exact_filename, sizeof(bs->exact_filename), + "blkdebug:%s:%s", + qdict_get_try_str(bs->options, "config") ?: "", + bs->file->bs->exact_filename); + } + + opts = qdict_new(); + qdict_put_obj(opts, "driver", QOBJECT(qstring_from_str("blkdebug"))); + + QINCREF(bs->file->bs->full_open_options); + qdict_put_obj(opts, "image", QOBJECT(bs->file->bs->full_open_options)); + + for (e = qdict_first(bs->options); e; e = qdict_next(bs->options, e)) { + if (strcmp(qdict_entry_key(e), "x-image") && + strcmp(qdict_entry_key(e), "image") && + strncmp(qdict_entry_key(e), "image.", strlen("image."))) + { + qobject_incref(qdict_entry_value(e)); + qdict_put_obj(opts, qdict_entry_key(e), qdict_entry_value(e)); + } + } + + bs->full_open_options = opts; +} + +static BlockDriver bdrv_blkdebug = { + .format_name = "blkdebug", + .protocol_name = "blkdebug", + .instance_size = sizeof(BDRVBlkdebugState), + + .bdrv_parse_filename = blkdebug_parse_filename, + .bdrv_file_open = blkdebug_open, + .bdrv_close = blkdebug_close, + .bdrv_getlength = blkdebug_getlength, + .bdrv_truncate = blkdebug_truncate, + .bdrv_refresh_filename = blkdebug_refresh_filename, + + .bdrv_aio_readv = blkdebug_aio_readv, + .bdrv_aio_writev = blkdebug_aio_writev, + .bdrv_aio_flush = blkdebug_aio_flush, + + .bdrv_debug_event = blkdebug_debug_event, + .bdrv_debug_breakpoint = blkdebug_debug_breakpoint, + .bdrv_debug_remove_breakpoint + = blkdebug_debug_remove_breakpoint, + .bdrv_debug_resume = blkdebug_debug_resume, + .bdrv_debug_is_suspended = blkdebug_debug_is_suspended, +}; + +static void bdrv_blkdebug_init(void) +{ + bdrv_register(&bdrv_blkdebug); +} + +block_init(bdrv_blkdebug_init); |
