include: Rename sysemu/ -> system/

Headers in include/sysemu/ are not only related to system
*emulation*, they are also used by virtualization. Rename
as system/ which is clearer.

Files renamed manually then mechanical change using sed tool.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Lei Yang <leiyang@redhat.com>
Message-Id: <20241203172445.28576-1-philmd@linaro.org>

block/qapi-system.c

@@ -0,0 +1,574 @@
+/*
+ * QMP command handlers specific to the system emulators
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or
+ * later.  See the COPYING file in the top-level directory.
+ *
+ * This file incorporates work covered by the following copyright and
+ * permission notice:
+ *
+ * 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 "qemu/osdep.h"
+
+#include "block/block_int.h"
+#include "qapi/error.h"
+#include "qapi/qapi-commands-block.h"
+#include "qapi/qmp/qdict.h"
+#include "system/block-backend.h"
+#include "system/blockdev.h"
+
+static BlockBackend *qmp_get_blk(const char *blk_name, const char *qdev_id,
+                                 Error **errp)
+{
+    BlockBackend *blk;
+
+    if (!blk_name == !qdev_id) {
+        error_setg(errp, "Need exactly one of 'device' and 'id'");
+        return NULL;
+    }
+
+    if (qdev_id) {
+        blk = blk_by_qdev_id(qdev_id, errp);
+    } else {
+        blk = blk_by_name(blk_name);
+        if (blk == NULL) {
+            error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
+                      "Device '%s' not found", blk_name);
+        }
+    }
+
+    return blk;
+}
+
+/*
+ * Attempt to open the tray of @device.
+ * If @force, ignore its tray lock.
+ * Else, if the tray is locked, don't open it, but ask the guest to open it.
+ * On error, store an error through @errp and return -errno.
+ * If @device does not exist, return -ENODEV.
+ * If it has no removable media, return -ENOTSUP.
+ * If it has no tray, return -ENOSYS.
+ * If the guest was asked to open the tray, return -EINPROGRESS.
+ * Else, return 0.
+ */
+static int do_open_tray(const char *blk_name, const char *qdev_id,
+                        bool force, Error **errp)
+{
+    BlockBackend *blk;
+    const char *device = qdev_id ?: blk_name;
+    bool locked;
+
+    blk = qmp_get_blk(blk_name, qdev_id, errp);
+    if (!blk) {
+        return -ENODEV;
+    }
+
+    if (!blk_dev_has_removable_media(blk)) {
+        error_setg(errp, "Device '%s' is not removable", device);
+        return -ENOTSUP;
+    }
+
+    if (!blk_dev_has_tray(blk)) {
+        error_setg(errp, "Device '%s' does not have a tray", device);
+        return -ENOSYS;
+    }
+
+    if (blk_dev_is_tray_open(blk)) {
+        return 0;
+    }
+
+    locked = blk_dev_is_medium_locked(blk);
+    if (locked) {
+        blk_dev_eject_request(blk, force);
+    }
+
+    if (!locked || force) {
+        blk_dev_change_media_cb(blk, false, &error_abort);
+    }
+
+    if (locked && !force) {
+        error_setg(errp, "Device '%s' is locked and force was not specified, "
+                   "wait for tray to open and try again", device);
+        return -EINPROGRESS;
+    }
+
+    return 0;
+}
+
+void qmp_blockdev_open_tray(const char *device,
+                            const char *id,
+                            bool has_force, bool force,
+                            Error **errp)
+{
+    Error *local_err = NULL;
+    int rc;
+
+    if (!has_force) {
+        force = false;
+    }
+    rc = do_open_tray(device, id, force, &local_err);
+    if (rc && rc != -ENOSYS && rc != -EINPROGRESS) {
+        error_propagate(errp, local_err);
+        return;
+    }
+    error_free(local_err);
+}
+
+void qmp_blockdev_close_tray(const char *device,
+                             const char *id,
+                             Error **errp)
+{
+    BlockBackend *blk;
+    Error *local_err = NULL;
+
+    blk = qmp_get_blk(device, id, errp);
+    if (!blk) {
+        return;
+    }
+
+    if (!blk_dev_has_removable_media(blk)) {
+        error_setg(errp, "Device '%s' is not removable", device ?: id);
+        return;
+    }
+
+    if (!blk_dev_has_tray(blk)) {
+        /* Ignore this command on tray-less devices */
+        return;
+    }
+
+    if (!blk_dev_is_tray_open(blk)) {
+        return;
+    }
+
+    blk_dev_change_media_cb(blk, true, &local_err);
+    if (local_err) {
+        error_propagate(errp, local_err);
+        return;
+    }
+}
+
+static void GRAPH_UNLOCKED
+blockdev_remove_medium(const char *device, const char *id, Error **errp)
+{
+    BlockBackend *blk;
+    BlockDriverState *bs;
+    bool has_attached_device;
+
+    GLOBAL_STATE_CODE();
+
+    blk = qmp_get_blk(device, id, errp);
+    if (!blk) {
+        return;
+    }
+
+    /* For BBs without a device, we can exchange the BDS tree at will */
+    has_attached_device = blk_get_attached_dev(blk);
+
+    if (has_attached_device && !blk_dev_has_removable_media(blk)) {
+        error_setg(errp, "Device '%s' is not removable", device ?: id);
+        return;
+    }
+
+    if (has_attached_device && blk_dev_has_tray(blk) &&
+        !blk_dev_is_tray_open(blk))
+    {
+        error_setg(errp, "Tray of device '%s' is not open", device ?: id);
+        return;
+    }
+
+    bs = blk_bs(blk);
+    if (!bs) {
+        return;
+    }
+
+    bdrv_graph_rdlock_main_loop();
+    if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_EJECT, errp)) {
+        bdrv_graph_rdunlock_main_loop();
+        return;
+    }
+    bdrv_graph_rdunlock_main_loop();
+
+    blk_remove_bs(blk);
+
+    if (!blk_dev_has_tray(blk)) {
+        /* For tray-less devices, blockdev-open-tray is a no-op (or may not be
+         * called at all); therefore, the medium needs to be ejected here.
+         * Do it after blk_remove_bs() so blk_is_inserted(blk) returns the @load
+         * value passed here (i.e. false). */
+        blk_dev_change_media_cb(blk, false, &error_abort);
+    }
+}
+
+void qmp_blockdev_remove_medium(const char *id, Error **errp)
+{
+    blockdev_remove_medium(NULL, id, errp);
+}
+
+static void qmp_blockdev_insert_anon_medium(BlockBackend *blk,
+                                            BlockDriverState *bs, Error **errp)
+{
+    Error *local_err = NULL;
+    bool has_device;
+    int ret;
+
+    /* For BBs without a device, we can exchange the BDS tree at will */
+    has_device = blk_get_attached_dev(blk);
+
+    if (has_device && !blk_dev_has_removable_media(blk)) {
+        error_setg(errp, "Device is not removable");
+        return;
+    }
+
+    if (has_device && blk_dev_has_tray(blk) && !blk_dev_is_tray_open(blk)) {
+        error_setg(errp, "Tray of the device is not open");
+        return;
+    }
+
+    if (blk_bs(blk)) {
+        error_setg(errp, "There already is a medium in the device");
+        return;
+    }
+
+    ret = blk_insert_bs(blk, bs, errp);
+    if (ret < 0) {
+        return;
+    }
+
+    if (!blk_dev_has_tray(blk)) {
+        /* For tray-less devices, blockdev-close-tray is a no-op (or may not be
+         * called at all); therefore, the medium needs to be pushed into the
+         * slot here.
+         * Do it after blk_insert_bs() so blk_is_inserted(blk) returns the @load
+         * value passed here (i.e. true). */
+        blk_dev_change_media_cb(blk, true, &local_err);
+        if (local_err) {
+            error_propagate(errp, local_err);
+            blk_remove_bs(blk);
+            return;
+        }
+    }
+}
+
+static void blockdev_insert_medium(const char *device, const char *id,
+                                   const char *node_name, Error **errp)
+{
+    BlockBackend *blk;
+    BlockDriverState *bs;
+
+    GRAPH_RDLOCK_GUARD_MAINLOOP();
+
+    blk = qmp_get_blk(device, id, errp);
+    if (!blk) {
+        return;
+    }
+
+    bs = bdrv_find_node(node_name);
+    if (!bs) {
+        error_setg(errp, "Node '%s' not found", node_name);
+        return;
+    }
+
+    if (bdrv_has_blk(bs)) {
+        error_setg(errp, "Node '%s' is already in use", node_name);
+        return;
+    }
+
+    qmp_blockdev_insert_anon_medium(blk, bs, errp);
+}
+
+void qmp_blockdev_insert_medium(const char *id, const char *node_name,
+                                Error **errp)
+{
+    blockdev_insert_medium(NULL, id, node_name, errp);
+}
+
+void qmp_blockdev_change_medium(const char *device,
+                                const char *id,
+                                const char *filename,
+                                const char *format,
+                                bool has_force, bool force,
+                                bool has_read_only,
+                                BlockdevChangeReadOnlyMode read_only,
+                                Error **errp)
+{
+    BlockBackend *blk;
+    BlockDriverState *medium_bs = NULL;
+    int bdrv_flags;
+    bool detect_zeroes;
+    int rc;
+    QDict *options = NULL;
+    Error *err = NULL;
+
+    blk = qmp_get_blk(device, id, errp);
+    if (!blk) {
+        goto fail;
+    }
+
+    if (blk_bs(blk)) {
+        blk_update_root_state(blk);
+    }
+
+    bdrv_flags = blk_get_open_flags_from_root_state(blk);
+    bdrv_flags &= ~(BDRV_O_TEMPORARY | BDRV_O_SNAPSHOT | BDRV_O_NO_BACKING |
+        BDRV_O_PROTOCOL | BDRV_O_AUTO_RDONLY);
+
+    if (!has_read_only) {
+        read_only = BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN;
+    }
+
+    switch (read_only) {
+    case BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN:
+        break;
+
+    case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_ONLY:
+        bdrv_flags &= ~BDRV_O_RDWR;
+        break;
+
+    case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_WRITE:
+        bdrv_flags |= BDRV_O_RDWR;
+        break;
+
+    default:
+        abort();
+    }
+
+    options = qdict_new();
+    detect_zeroes = blk_get_detect_zeroes_from_root_state(blk);
+    qdict_put_str(options, "detect-zeroes", detect_zeroes ? "on" : "off");
+
+    if (format) {
+        qdict_put_str(options, "driver", format);
+    }
+
+    medium_bs = bdrv_open(filename, NULL, options, bdrv_flags, errp);
+
+    if (!medium_bs) {
+        goto fail;
+    }
+
+    rc = do_open_tray(device, id, force, &err);
+    if (rc && rc != -ENOSYS) {
+        error_propagate(errp, err);
+        goto fail;
+    }
+    error_free(err);
+    err = NULL;
+
+    blockdev_remove_medium(device, id, &err);
+    if (err) {
+        error_propagate(errp, err);
+        goto fail;
+    }
+
+    qmp_blockdev_insert_anon_medium(blk, medium_bs, &err);
+    if (err) {
+        error_propagate(errp, err);
+        goto fail;
+    }
+
+    qmp_blockdev_close_tray(device, id, errp);
+
+fail:
+    /* If the medium has been inserted, the device has its own reference, so
+     * ours must be relinquished; and if it has not been inserted successfully,
+     * the reference must be relinquished anyway */
+    bdrv_unref(medium_bs);
+}
+
+void qmp_eject(const char *device, const char *id,
+               bool has_force, bool force, Error **errp)
+{
+    Error *local_err = NULL;
+    int rc;
+
+    if (!has_force) {
+        force = false;
+    }
+
+    rc = do_open_tray(device, id, force, &local_err);
+    if (rc && rc != -ENOSYS) {
+        error_propagate(errp, local_err);
+        return;
+    }
+    error_free(local_err);
+
+    blockdev_remove_medium(device, id, errp);
+}
+
+/* throttling disk I/O limits */
+void qmp_block_set_io_throttle(BlockIOThrottle *arg, Error **errp)
+{
+    ThrottleConfig cfg;
+    BlockDriverState *bs;
+    BlockBackend *blk;
+
+    blk = qmp_get_blk(arg->device, arg->id, errp);
+    if (!blk) {
+        return;
+    }
+
+    bs = blk_bs(blk);
+    if (!bs) {
+        error_setg(errp, "Device has no medium");
+        return;
+    }
+
+    throttle_config_init(&cfg);
+    cfg.buckets[THROTTLE_BPS_TOTAL].avg = arg->bps;
+    cfg.buckets[THROTTLE_BPS_READ].avg  = arg->bps_rd;
+    cfg.buckets[THROTTLE_BPS_WRITE].avg = arg->bps_wr;
+
+    cfg.buckets[THROTTLE_OPS_TOTAL].avg = arg->iops;
+    cfg.buckets[THROTTLE_OPS_READ].avg  = arg->iops_rd;
+    cfg.buckets[THROTTLE_OPS_WRITE].avg = arg->iops_wr;
+
+    if (arg->has_bps_max) {
+        cfg.buckets[THROTTLE_BPS_TOTAL].max = arg->bps_max;
+    }
+    if (arg->has_bps_rd_max) {
+        cfg.buckets[THROTTLE_BPS_READ].max = arg->bps_rd_max;
+    }
+    if (arg->has_bps_wr_max) {
+        cfg.buckets[THROTTLE_BPS_WRITE].max = arg->bps_wr_max;
+    }
+    if (arg->has_iops_max) {
+        cfg.buckets[THROTTLE_OPS_TOTAL].max = arg->iops_max;
+    }
+    if (arg->has_iops_rd_max) {
+        cfg.buckets[THROTTLE_OPS_READ].max = arg->iops_rd_max;
+    }
+    if (arg->has_iops_wr_max) {
+        cfg.buckets[THROTTLE_OPS_WRITE].max = arg->iops_wr_max;
+    }
+
+    if (arg->has_bps_max_length) {
+        cfg.buckets[THROTTLE_BPS_TOTAL].burst_length = arg->bps_max_length;
+    }
+    if (arg->has_bps_rd_max_length) {
+        cfg.buckets[THROTTLE_BPS_READ].burst_length = arg->bps_rd_max_length;
+    }
+    if (arg->has_bps_wr_max_length) {
+        cfg.buckets[THROTTLE_BPS_WRITE].burst_length = arg->bps_wr_max_length;
+    }
+    if (arg->has_iops_max_length) {
+        cfg.buckets[THROTTLE_OPS_TOTAL].burst_length = arg->iops_max_length;
+    }
+    if (arg->has_iops_rd_max_length) {
+        cfg.buckets[THROTTLE_OPS_READ].burst_length = arg->iops_rd_max_length;
+    }
+    if (arg->has_iops_wr_max_length) {
+        cfg.buckets[THROTTLE_OPS_WRITE].burst_length = arg->iops_wr_max_length;
+    }
+
+    if (arg->has_iops_size) {
+        cfg.op_size = arg->iops_size;
+    }
+
+    if (!throttle_is_valid(&cfg, errp)) {
+        return;
+    }
+
+    if (throttle_enabled(&cfg)) {
+        /* Enable I/O limits if they're not enabled yet, otherwise
+         * just update the throttling group. */
+        if (!blk_get_public(blk)->throttle_group_member.throttle_state) {
+            blk_io_limits_enable(blk, arg->group ?: arg->device ?: arg->id);
+        } else if (arg->group) {
+            blk_io_limits_update_group(blk, arg->group);
+        }
+        /* Set the new throttling configuration */
+        blk_set_io_limits(blk, &cfg);
+    } else if (blk_get_public(blk)->throttle_group_member.throttle_state) {
+        /* If all throttling settings are set to 0, disable I/O limits */
+        blk_io_limits_disable(blk);
+    }
+}
+
+void qmp_block_latency_histogram_set(
+    const char *id,
+    bool has_boundaries, uint64List *boundaries,
+    bool has_boundaries_read, uint64List *boundaries_read,
+    bool has_boundaries_write, uint64List *boundaries_write,
+    bool has_boundaries_append, uint64List *boundaries_append,
+    bool has_boundaries_flush, uint64List *boundaries_flush,
+    Error **errp)
+{
+    BlockBackend *blk = qmp_get_blk(NULL, id, errp);
+    BlockAcctStats *stats;
+    int ret;
+
+    if (!blk) {
+        return;
+    }
+
+    stats = blk_get_stats(blk);
+
+    if (!has_boundaries && !has_boundaries_read && !has_boundaries_write &&
+        !has_boundaries_flush)
+    {
+        block_latency_histograms_clear(stats);
+        return;
+    }
+
+    if (has_boundaries || has_boundaries_read) {
+        ret = block_latency_histogram_set(
+            stats, BLOCK_ACCT_READ,
+            has_boundaries_read ? boundaries_read : boundaries);
+        if (ret) {
+            error_setg(errp, "Device '%s' set read boundaries fail", id);
+            return;
+        }
+    }
+
+    if (has_boundaries || has_boundaries_write) {
+        ret = block_latency_histogram_set(
+            stats, BLOCK_ACCT_WRITE,
+            has_boundaries_write ? boundaries_write : boundaries);
+        if (ret) {
+            error_setg(errp, "Device '%s' set write boundaries fail", id);
+            return;
+        }
+    }
+
+    if (has_boundaries || has_boundaries_append) {
+        ret = block_latency_histogram_set(
+                stats, BLOCK_ACCT_ZONE_APPEND,
+                has_boundaries_append ? boundaries_append : boundaries);
+        if (ret) {
+            error_setg(errp, "Device '%s' set append write boundaries fail", id);
+            return;
+        }
+    }
+
+    if (has_boundaries || has_boundaries_flush) {
+        ret = block_latency_histogram_set(
+            stats, BLOCK_ACCT_FLUSH,
+            has_boundaries_flush ? boundaries_flush : boundaries);
+        if (ret) {
+            error_setg(errp, "Device '%s' set flush boundaries fail", id);
+            return;
+        }
+    }
+}