Archipelago » qemu

/*

 * Block layer qmp and info dump related functions

 *

 * Copyright (c) 2003-2008 Fabrice Bellard

 *

 * 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 "block/qapi.h"

#include "block/block_int.h"

#include "qmp-commands.h"

/*

 * Returns 0 on success, with *p_list either set to describe snapshot

 * information, or NULL because there are no snapshots.  Returns -errno on

 * error, with *p_list untouched.

 */

int bdrv_query_snapshot_info_list(BlockDriverState *bs,

                                  SnapshotInfoList **p_list,

                                  Error **errp)

{

    int i, sn_count;

    QEMUSnapshotInfo *sn_tab = NULL;

    SnapshotInfoList *info_list, *cur_item = NULL, *head = NULL;

    SnapshotInfo *info;

    sn_count = bdrv_snapshot_list(bs, &sn_tab);

    if (sn_count < 0) {

        const char *dev = bdrv_get_device_name(bs);

        switch (sn_count) {

        case -ENOMEDIUM:

            error_setg(errp, "Device '%s' is not inserted", dev);

            break;

        case -ENOTSUP:

            error_setg(errp,

                       "Device '%s' does not support internal snapshots",

                       dev);

            break;

        default:

            error_setg_errno(errp, -sn_count,

                             "Can't list snapshots of device '%s'", dev);

            break;

        }

        return sn_count;

    }

    for (i = 0; i < sn_count; i++) {

        info = g_new0(SnapshotInfo, 1);

        info->id            = g_strdup(sn_tab[i].id_str);

        info->name          = g_strdup(sn_tab[i].name);

        info->vm_state_size = sn_tab[i].vm_state_size;

        info->date_sec      = sn_tab[i].date_sec;

        info->date_nsec     = sn_tab[i].date_nsec;

        info->vm_clock_sec  = sn_tab[i].vm_clock_nsec / 1000000000;

        info->vm_clock_nsec = sn_tab[i].vm_clock_nsec % 1000000000;

        info_list = g_new0(SnapshotInfoList, 1);

        info_list->value = info;

        /* XXX: waiting for the qapi to support qemu-queue.h types */

        if (!cur_item) {

            head = cur_item = info_list;

        } else {

            cur_item->next = info_list;

            cur_item = info_list;

        }

    }

    g_free(sn_tab);

    *p_list = head;

    return 0;

}

/**

 * bdrv_query_image_info:

 * @bs: block device to examine

 * @p_info: location to store image information

 * @errp: location to store error information

 *

 * Store "flat" image information in @p_info.

 *

 * "Flat" means it does *not* query backing image information,

 * i.e. (*pinfo)->has_backing_image will be set to false and

 * (*pinfo)->backing_image to NULL even when the image does in fact have

 * a backing image.

 *

 * @p_info will be set only on success. On error, store error in @errp.

 */

void bdrv_query_image_info(BlockDriverState *bs,

                           ImageInfo **p_info,

                           Error **errp)

{

    uint64_t total_sectors;

    const char *backing_filename;

    char backing_filename2[1024];

    BlockDriverInfo bdi;

    int ret;

    Error *err = NULL;

    ImageInfo *info = g_new0(ImageInfo, 1);

    bdrv_get_geometry(bs, &total_sectors);

    info->filename        = g_strdup(bs->filename);

    info->format          = g_strdup(bdrv_get_format_name(bs));

    info->virtual_size    = total_sectors * 512;

    info->actual_size     = bdrv_get_allocated_file_size(bs);

    info->has_actual_size = info->actual_size >= 0;

    if (bdrv_is_encrypted(bs)) {

        info->encrypted = true;

        info->has_encrypted = true;

    }

    if (bdrv_get_info(bs, &bdi) >= 0) {

        if (bdi.cluster_size != 0) {

            info->cluster_size = bdi.cluster_size;

            info->has_cluster_size = true;

        }

        info->dirty_flag = bdi.is_dirty;

        info->has_dirty_flag = true;

    }

    backing_filename = bs->backing_file;

    if (backing_filename[0] != '\0') {

        info->backing_filename = g_strdup(backing_filename);

        info->has_backing_filename = true;

        bdrv_get_full_backing_filename(bs, backing_filename2,

                                       sizeof(backing_filename2));

        if (strcmp(backing_filename, backing_filename2) != 0) {

            info->full_backing_filename =

                        g_strdup(backing_filename2);

            info->has_full_backing_filename = true;

        }

        if (bs->backing_format[0]) {

            info->backing_filename_format = g_strdup(bs->backing_format);

            info->has_backing_filename_format = true;

        }

    }

    ret = bdrv_query_snapshot_info_list(bs, &info->snapshots, &err);

    switch (ret) {

    case 0:

        if (info->snapshots) {

            info->has_snapshots = true;

        }

        break;

    /* recoverable error */

    case -ENOMEDIUM:

    case -ENOTSUP:

        error_free(err);

        break;

    default:

        error_propagate(errp, err);

        qapi_free_ImageInfo(info);

        return;

    }

    *p_info = info;

}

/* @p_info will be set only on success. */

void bdrv_query_info(BlockDriverState *bs,

                     BlockInfo **p_info,

                     Error **errp)

{

    BlockInfo *info = g_malloc0(sizeof(*info));

    BlockDriverState *bs0;

    ImageInfo **p_image_info;

    Error *local_err = NULL;

    info->device = g_strdup(bs->device_name);

    info->type = g_strdup("unknown");

    info->locked = bdrv_dev_is_medium_locked(bs);

    info->removable = bdrv_dev_has_removable_media(bs);

    if (bdrv_dev_has_removable_media(bs)) {

        info->has_tray_open = true;

        info->tray_open = bdrv_dev_is_tray_open(bs);

    }

    if (bdrv_iostatus_is_enabled(bs)) {

        info->has_io_status = true;

        info->io_status = bs->iostatus;

    }

    if (bs->dirty_bitmap) {

        info->has_dirty = true;

        info->dirty = g_malloc0(sizeof(*info->dirty));

        info->dirty->count = bdrv_get_dirty_count(bs) * BDRV_SECTOR_SIZE;

        info->dirty->granularity =

         ((int64_t) BDRV_SECTOR_SIZE << hbitmap_granularity(bs->dirty_bitmap));

    }

    if (bs->drv) {

        info->has_inserted = true;

        info->inserted = g_malloc0(sizeof(*info->inserted));

        info->inserted->file = g_strdup(bs->filename);

        info->inserted->ro = bs->read_only;

        info->inserted->drv = g_strdup(bs->drv->format_name);

        info->inserted->encrypted = bs->encrypted;

        info->inserted->encryption_key_missing = bdrv_key_required(bs);

        if (bs->backing_file[0]) {

            info->inserted->has_backing_file = true;

            info->inserted->backing_file = g_strdup(bs->backing_file);

        }

        info->inserted->backing_file_depth = bdrv_get_backing_file_depth(bs);

        if (bs->io_limits_enabled) {

            ThrottleConfig cfg;

            throttle_get_config(&bs->throttle_state, &cfg);

            info->inserted->bps     = cfg.buckets[THROTTLE_BPS_TOTAL].avg;

            info->inserted->bps_rd  = cfg.buckets[THROTTLE_BPS_READ].avg;

            info->inserted->bps_wr  = cfg.buckets[THROTTLE_BPS_WRITE].avg;

            info->inserted->iops    = cfg.buckets[THROTTLE_OPS_TOTAL].avg;

            info->inserted->iops_rd = cfg.buckets[THROTTLE_OPS_READ].avg;

            info->inserted->iops_wr = cfg.buckets[THROTTLE_OPS_WRITE].avg;

            info->inserted->has_bps_max     =

                cfg.buckets[THROTTLE_BPS_TOTAL].max;

            info->inserted->bps_max         =

                cfg.buckets[THROTTLE_BPS_TOTAL].max;

            info->inserted->has_bps_rd_max  =

                cfg.buckets[THROTTLE_BPS_READ].max;

            info->inserted->bps_rd_max      =

                cfg.buckets[THROTTLE_BPS_READ].max;

            info->inserted->has_bps_wr_max  =

                cfg.buckets[THROTTLE_BPS_WRITE].max;

            info->inserted->bps_wr_max      =

                cfg.buckets[THROTTLE_BPS_WRITE].max;

            info->inserted->has_iops_max    =

                cfg.buckets[THROTTLE_OPS_TOTAL].max;

            info->inserted->iops_max        =

                cfg.buckets[THROTTLE_OPS_TOTAL].max;

            info->inserted->has_iops_rd_max =

                cfg.buckets[THROTTLE_OPS_READ].max;

            info->inserted->iops_rd_max     =

                cfg.buckets[THROTTLE_OPS_READ].max;

            info->inserted->has_iops_wr_max =

                cfg.buckets[THROTTLE_OPS_WRITE].max;

            info->inserted->iops_wr_max     =

                cfg.buckets[THROTTLE_OPS_WRITE].max;

            info->inserted->has_iops_size = cfg.op_size;

            info->inserted->iops_size = cfg.op_size;

        }

        bs0 = bs;

        p_image_info = &info->inserted->image;

        while (1) {

            bdrv_query_image_info(bs0, p_image_info, &local_err);

            if (error_is_set(&local_err)) {

                error_propagate(errp, local_err);

                goto err;

            }

            if (bs0->drv && bs0->backing_hd) {

                bs0 = bs0->backing_hd;

                (*p_image_info)->has_backing_image = true;

                p_image_info = &((*p_image_info)->backing_image);

            } else {

                break;

            }

        }

    }

    *p_info = info;

    return;

 err:

    qapi_free_BlockInfo(info);

}

BlockStats *bdrv_query_stats(const BlockDriverState *bs)

{

    BlockStats *s;

    s = g_malloc0(sizeof(*s));

    if (bs->device_name[0]) {

        s->has_device = true;

        s->device = g_strdup(bs->device_name);

    }

    s->stats = g_malloc0(sizeof(*s->stats));

    s->stats->rd_bytes = bs->nr_bytes[BDRV_ACCT_READ];

    s->stats->wr_bytes = bs->nr_bytes[BDRV_ACCT_WRITE];

    s->stats->rd_operations = bs->nr_ops[BDRV_ACCT_READ];

    s->stats->wr_operations = bs->nr_ops[BDRV_ACCT_WRITE];

    s->stats->wr_highest_offset = bs->wr_highest_sector * BDRV_SECTOR_SIZE;

    s->stats->flush_operations = bs->nr_ops[BDRV_ACCT_FLUSH];

    s->stats->wr_total_time_ns = bs->total_time_ns[BDRV_ACCT_WRITE];

    s->stats->rd_total_time_ns = bs->total_time_ns[BDRV_ACCT_READ];

    s->stats->flush_total_time_ns = bs->total_time_ns[BDRV_ACCT_FLUSH];

    if (bs->file) {

        s->has_parent = true;

        s->parent = bdrv_query_stats(bs->file);

    }

    return s;

}

BlockInfoList *qmp_query_block(Error **errp)

{

    BlockInfoList *head = NULL, **p_next = &head;

    BlockDriverState *bs = NULL;

    Error *local_err = NULL;

     while ((bs = bdrv_next(bs))) {

        BlockInfoList *info = g_malloc0(sizeof(*info));

        bdrv_query_info(bs, &info->value, &local_err);

        if (error_is_set(&local_err)) {

            error_propagate(errp, local_err);

            goto err;

        }

        *p_next = info;

        p_next = &info->next;

    }

    return head;

 err:

    qapi_free_BlockInfoList(head);

    return NULL;

}

BlockStatsList *qmp_query_blockstats(Error **errp)

{

    BlockStatsList *head = NULL, **p_next = &head;

    BlockDriverState *bs = NULL;

     while ((bs = bdrv_next(bs))) {

        BlockStatsList *info = g_malloc0(sizeof(*info));

        info->value = bdrv_query_stats(bs);

        *p_next = info;

        p_next = &info->next;

    }

    return head;

}

#define NB_SUFFIXES 4

static char *get_human_readable_size(char *buf, int buf_size, int64_t size)

{

    static const char suffixes[NB_SUFFIXES] = "KMGT";

    int64_t base;

    int i;

    if (size <= 999) {

        snprintf(buf, buf_size, "%" PRId64, size);

    } else {

        base = 1024;

        for (i = 0; i < NB_SUFFIXES; i++) {

            if (size < (10 * base)) {

                snprintf(buf, buf_size, "%0.1f%c",

                         (double)size / base,

                         suffixes[i]);

                break;

            } else if (size < (1000 * base) || i == (NB_SUFFIXES - 1)) {

                snprintf(buf, buf_size, "%" PRId64 "%c",

                         ((size + (base >> 1)) / base),

                         suffixes[i]);

                break;

            }

            base = base * 1024;

        }

    }

    return buf;

}

void bdrv_snapshot_dump(fprintf_function func_fprintf, void *f,

                        QEMUSnapshotInfo *sn)

{

    char buf1[128], date_buf[128], clock_buf[128];

    struct tm tm;

    time_t ti;

    int64_t secs;

    if (!sn) {

        func_fprintf(f,

                     "%-10s%-20s%7s%20s%15s",

                     "ID", "TAG", "VM SIZE", "DATE", "VM CLOCK");

    } else {

        ti = sn->date_sec;

        localtime_r(&ti, &tm);

        strftime(date_buf, sizeof(date_buf),

                 "%Y-%m-%d %H:%M:%S", &tm);

        secs = sn->vm_clock_nsec / 1000000000;

        snprintf(clock_buf, sizeof(clock_buf),

                 "%02d:%02d:%02d.%03d",

                 (int)(secs / 3600),

                 (int)((secs / 60) % 60),

                 (int)(secs % 60),

                 (int)((sn->vm_clock_nsec / 1000000) % 1000));

        func_fprintf(f,

                     "%-10s%-20s%7s%20s%15s",

                     sn->id_str, sn->name,

                     get_human_readable_size(buf1, sizeof(buf1),

                                             sn->vm_state_size),

                     date_buf,

                     clock_buf);

    }

}

void bdrv_image_info_dump(fprintf_function func_fprintf, void *f,

                          ImageInfo *info)

{

    char size_buf[128], dsize_buf[128];

    if (!info->has_actual_size) {

        snprintf(dsize_buf, sizeof(dsize_buf), "unavailable");

    } else {

        get_human_readable_size(dsize_buf, sizeof(dsize_buf),

                                info->actual_size);

    }

    get_human_readable_size(size_buf, sizeof(size_buf), info->virtual_size);

    func_fprintf(f,

                 "image: %s\n"

                 "file format: %s\n"

                 "virtual size: %s (%" PRId64 " bytes)\n"

                 "disk size: %s\n",

                 info->filename, info->format, size_buf,

                 info->virtual_size,

                 dsize_buf);

    if (info->has_encrypted && info->encrypted) {

        func_fprintf(f, "encrypted: yes\n");

    }

    if (info->has_cluster_size) {

        func_fprintf(f, "cluster_size: %" PRId64 "\n",

                       info->cluster_size);

    }

    if (info->has_dirty_flag && info->dirty_flag) {

        func_fprintf(f, "cleanly shut down: no\n");

    }

    if (info->has_backing_filename) {

        func_fprintf(f, "backing file: %s", info->backing_filename);

        if (info->has_full_backing_filename) {

            func_fprintf(f, " (actual path: %s)", info->full_backing_filename);

        }

        func_fprintf(f, "\n");

        if (info->has_backing_filename_format) {

            func_fprintf(f, "backing file format: %s\n",

                         info->backing_filename_format);

        }

    }

    if (info->has_snapshots) {

        SnapshotInfoList *elem;

        func_fprintf(f, "Snapshot list:\n");

        bdrv_snapshot_dump(func_fprintf, f, NULL);

        func_fprintf(f, "\n");

        /* Ideally bdrv_snapshot_dump() would operate on SnapshotInfoList but

         * we convert to the block layer's native QEMUSnapshotInfo for now.

         */

        for (elem = info->snapshots; elem; elem = elem->next) {

            QEMUSnapshotInfo sn = {

                .vm_state_size = elem->value->vm_state_size,

                .date_sec = elem->value->date_sec,

                .date_nsec = elem->value->date_nsec,

                .vm_clock_nsec = elem->value->vm_clock_sec * 1000000000ULL +

                                 elem->value->vm_clock_nsec,

            };

            pstrcpy(sn.id_str, sizeof(sn.id_str), elem->value->id);

            pstrcpy(sn.name, sizeof(sn.name), elem->value->name);

            bdrv_snapshot_dump(func_fprintf, f, &sn);

            func_fprintf(f, "\n");

        }

    }

}