| /* |
| * 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" |
| |
| 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 backing file */ |
| assert(bs->file == NULL); |
| ret = bdrv_open_image(&bs->file, qemu_opt_get(opts, "x-image"), options, "image", |
| bs, &child_file, false, &local_err); |
| if (ret < 0) { |
| 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(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, 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, 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, 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); |
| |
| printf("blkdebug: Suspended request '%s'\n", r.tag); |
| qemu_coroutine_yield(); |
| 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); |
| } |
| |
| static int blkdebug_truncate(BlockDriverState *bs, int64_t offset) |
| { |
| return bdrv_truncate(bs->file, 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->full_open_options) { |
| /* The config file cannot be recreated, so creating a plain filename |
| * is impossible */ |
| return; |
| } |
| |
| if (!force_json && bs->file->exact_filename[0]) { |
| snprintf(bs->exact_filename, sizeof(bs->exact_filename), |
| "blkdebug:%s:%s", |
| qdict_get_try_str(bs->options, "config") ?: "", |
| bs->file->exact_filename); |
| } |
| |
| opts = qdict_new(); |
| qdict_put_obj(opts, "driver", QOBJECT(qstring_from_str("blkdebug"))); |
| |
| QINCREF(bs->file->full_open_options); |
| qdict_put_obj(opts, "image", QOBJECT(bs->file->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); |