blockdev: Collect block device code in new blockdev.c
Anything that moves hundreds of lines out of vl.c can't be all bad.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
diff --git a/blockdev.c b/blockdev.c
new file mode 100644
index 0000000..bd9783a
--- /dev/null
+++ b/blockdev.c
@@ -0,0 +1,600 @@
+/*
+ * QEMU host block devices
+ *
+ * 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.
+ */
+
+#include "block.h"
+#include "blockdev.h"
+#include "monitor.h"
+#include "qerror.h"
+#include "qemu-option.h"
+#include "qemu-config.h"
+#include "sysemu.h"
+
+struct drivelist drives = QTAILQ_HEAD_INITIALIZER(drives);
+
+QemuOpts *drive_add(const char *file, const char *fmt, ...)
+{
+ va_list ap;
+ char optstr[1024];
+ QemuOpts *opts;
+
+ va_start(ap, fmt);
+ vsnprintf(optstr, sizeof(optstr), fmt, ap);
+ va_end(ap);
+
+ opts = qemu_opts_parse(&qemu_drive_opts, optstr, 0);
+ if (!opts) {
+ return NULL;
+ }
+ if (file)
+ qemu_opt_set(opts, "file", file);
+ return opts;
+}
+
+DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit)
+{
+ DriveInfo *dinfo;
+
+ /* seek interface, bus and unit */
+
+ QTAILQ_FOREACH(dinfo, &drives, next) {
+ if (dinfo->type == type &&
+ dinfo->bus == bus &&
+ dinfo->unit == unit)
+ return dinfo;
+ }
+
+ return NULL;
+}
+
+DriveInfo *drive_get_by_id(const char *id)
+{
+ DriveInfo *dinfo;
+
+ QTAILQ_FOREACH(dinfo, &drives, next) {
+ if (strcmp(id, dinfo->id))
+ continue;
+ return dinfo;
+ }
+ return NULL;
+}
+
+int drive_get_max_bus(BlockInterfaceType type)
+{
+ int max_bus;
+ DriveInfo *dinfo;
+
+ max_bus = -1;
+ QTAILQ_FOREACH(dinfo, &drives, next) {
+ if(dinfo->type == type &&
+ dinfo->bus > max_bus)
+ max_bus = dinfo->bus;
+ }
+ return max_bus;
+}
+
+const char *drive_get_serial(BlockDriverState *bdrv)
+{
+ DriveInfo *dinfo;
+
+ QTAILQ_FOREACH(dinfo, &drives, next) {
+ if (dinfo->bdrv == bdrv)
+ return dinfo->serial;
+ }
+
+ return "\0";
+}
+
+BlockInterfaceErrorAction drive_get_on_error(
+ BlockDriverState *bdrv, int is_read)
+{
+ DriveInfo *dinfo;
+
+ QTAILQ_FOREACH(dinfo, &drives, next) {
+ if (dinfo->bdrv == bdrv)
+ return is_read ? dinfo->on_read_error : dinfo->on_write_error;
+ }
+
+ return is_read ? BLOCK_ERR_REPORT : BLOCK_ERR_STOP_ENOSPC;
+}
+
+static void bdrv_format_print(void *opaque, const char *name)
+{
+ fprintf(stderr, " %s", name);
+}
+
+void drive_uninit(DriveInfo *dinfo)
+{
+ qemu_opts_del(dinfo->opts);
+ bdrv_delete(dinfo->bdrv);
+ QTAILQ_REMOVE(&drives, dinfo, next);
+ qemu_free(dinfo);
+}
+
+static int parse_block_error_action(const char *buf, int is_read)
+{
+ if (!strcmp(buf, "ignore")) {
+ return BLOCK_ERR_IGNORE;
+ } else if (!is_read && !strcmp(buf, "enospc")) {
+ return BLOCK_ERR_STOP_ENOSPC;
+ } else if (!strcmp(buf, "stop")) {
+ return BLOCK_ERR_STOP_ANY;
+ } else if (!strcmp(buf, "report")) {
+ return BLOCK_ERR_REPORT;
+ } else {
+ fprintf(stderr, "qemu: '%s' invalid %s error action\n",
+ buf, is_read ? "read" : "write");
+ return -1;
+ }
+}
+
+DriveInfo *drive_init(QemuOpts *opts, int default_to_scsi, int *fatal_error)
+{
+ const char *buf;
+ const char *file = NULL;
+ char devname[128];
+ const char *serial;
+ const char *mediastr = "";
+ BlockInterfaceType type;
+ enum { MEDIA_DISK, MEDIA_CDROM } media;
+ int bus_id, unit_id;
+ int cyls, heads, secs, translation;
+ BlockDriver *drv = NULL;
+ int max_devs;
+ int index;
+ int ro = 0;
+ int bdrv_flags = 0;
+ int on_read_error, on_write_error;
+ const char *devaddr;
+ DriveInfo *dinfo;
+ int snapshot = 0;
+ int ret;
+
+ *fatal_error = 1;
+
+ translation = BIOS_ATA_TRANSLATION_AUTO;
+
+ if (default_to_scsi) {
+ type = IF_SCSI;
+ max_devs = MAX_SCSI_DEVS;
+ pstrcpy(devname, sizeof(devname), "scsi");
+ } else {
+ type = IF_IDE;
+ max_devs = MAX_IDE_DEVS;
+ pstrcpy(devname, sizeof(devname), "ide");
+ }
+ media = MEDIA_DISK;
+
+ /* extract parameters */
+ bus_id = qemu_opt_get_number(opts, "bus", 0);
+ unit_id = qemu_opt_get_number(opts, "unit", -1);
+ index = qemu_opt_get_number(opts, "index", -1);
+
+ cyls = qemu_opt_get_number(opts, "cyls", 0);
+ heads = qemu_opt_get_number(opts, "heads", 0);
+ secs = qemu_opt_get_number(opts, "secs", 0);
+
+ snapshot = qemu_opt_get_bool(opts, "snapshot", 0);
+ ro = qemu_opt_get_bool(opts, "readonly", 0);
+
+ file = qemu_opt_get(opts, "file");
+ serial = qemu_opt_get(opts, "serial");
+
+ if ((buf = qemu_opt_get(opts, "if")) != NULL) {
+ pstrcpy(devname, sizeof(devname), buf);
+ if (!strcmp(buf, "ide")) {
+ type = IF_IDE;
+ max_devs = MAX_IDE_DEVS;
+ } else if (!strcmp(buf, "scsi")) {
+ type = IF_SCSI;
+ max_devs = MAX_SCSI_DEVS;
+ } else if (!strcmp(buf, "floppy")) {
+ type = IF_FLOPPY;
+ max_devs = 0;
+ } else if (!strcmp(buf, "pflash")) {
+ type = IF_PFLASH;
+ max_devs = 0;
+ } else if (!strcmp(buf, "mtd")) {
+ type = IF_MTD;
+ max_devs = 0;
+ } else if (!strcmp(buf, "sd")) {
+ type = IF_SD;
+ max_devs = 0;
+ } else if (!strcmp(buf, "virtio")) {
+ type = IF_VIRTIO;
+ max_devs = 0;
+ } else if (!strcmp(buf, "xen")) {
+ type = IF_XEN;
+ max_devs = 0;
+ } else if (!strcmp(buf, "none")) {
+ type = IF_NONE;
+ max_devs = 0;
+ } else {
+ fprintf(stderr, "qemu: unsupported bus type '%s'\n", buf);
+ return NULL;
+ }
+ }
+
+ if (cyls || heads || secs) {
+ if (cyls < 1 || (type == IF_IDE && cyls > 16383)) {
+ fprintf(stderr, "qemu: '%s' invalid physical cyls number\n", buf);
+ return NULL;
+ }
+ if (heads < 1 || (type == IF_IDE && heads > 16)) {
+ fprintf(stderr, "qemu: '%s' invalid physical heads number\n", buf);
+ return NULL;
+ }
+ if (secs < 1 || (type == IF_IDE && secs > 63)) {
+ fprintf(stderr, "qemu: '%s' invalid physical secs number\n", buf);
+ return NULL;
+ }
+ }
+
+ if ((buf = qemu_opt_get(opts, "trans")) != NULL) {
+ if (!cyls) {
+ fprintf(stderr,
+ "qemu: '%s' trans must be used with cyls,heads and secs\n",
+ buf);
+ return NULL;
+ }
+ if (!strcmp(buf, "none"))
+ translation = BIOS_ATA_TRANSLATION_NONE;
+ else if (!strcmp(buf, "lba"))
+ translation = BIOS_ATA_TRANSLATION_LBA;
+ else if (!strcmp(buf, "auto"))
+ translation = BIOS_ATA_TRANSLATION_AUTO;
+ else {
+ fprintf(stderr, "qemu: '%s' invalid translation type\n", buf);
+ return NULL;
+ }
+ }
+
+ if ((buf = qemu_opt_get(opts, "media")) != NULL) {
+ if (!strcmp(buf, "disk")) {
+ media = MEDIA_DISK;
+ } else if (!strcmp(buf, "cdrom")) {
+ if (cyls || secs || heads) {
+ fprintf(stderr,
+ "qemu: '%s' invalid physical CHS format\n", buf);
+ return NULL;
+ }
+ media = MEDIA_CDROM;
+ } else {
+ fprintf(stderr, "qemu: '%s' invalid media\n", buf);
+ return NULL;
+ }
+ }
+
+ if ((buf = qemu_opt_get(opts, "cache")) != NULL) {
+ if (!strcmp(buf, "off") || !strcmp(buf, "none")) {
+ bdrv_flags |= BDRV_O_NOCACHE;
+ } else if (!strcmp(buf, "writeback")) {
+ bdrv_flags |= BDRV_O_CACHE_WB;
+ } else if (!strcmp(buf, "unsafe")) {
+ bdrv_flags |= BDRV_O_CACHE_WB;
+ bdrv_flags |= BDRV_O_NO_FLUSH;
+ } else if (!strcmp(buf, "writethrough")) {
+ /* this is the default */
+ } else {
+ fprintf(stderr, "qemu: invalid cache option\n");
+ return NULL;
+ }
+ }
+
+#ifdef CONFIG_LINUX_AIO
+ if ((buf = qemu_opt_get(opts, "aio")) != NULL) {
+ if (!strcmp(buf, "native")) {
+ bdrv_flags |= BDRV_O_NATIVE_AIO;
+ } else if (!strcmp(buf, "threads")) {
+ /* this is the default */
+ } else {
+ fprintf(stderr, "qemu: invalid aio option\n");
+ return NULL;
+ }
+ }
+#endif
+
+ if ((buf = qemu_opt_get(opts, "format")) != NULL) {
+ if (strcmp(buf, "?") == 0) {
+ fprintf(stderr, "qemu: Supported formats:");
+ bdrv_iterate_format(bdrv_format_print, NULL);
+ fprintf(stderr, "\n");
+ return NULL;
+ }
+ drv = bdrv_find_whitelisted_format(buf);
+ if (!drv) {
+ fprintf(stderr, "qemu: '%s' invalid format\n", buf);
+ return NULL;
+ }
+ }
+
+ on_write_error = BLOCK_ERR_STOP_ENOSPC;
+ if ((buf = qemu_opt_get(opts, "werror")) != NULL) {
+ if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && type != IF_NONE) {
+ fprintf(stderr, "werror is no supported by this format\n");
+ return NULL;
+ }
+
+ on_write_error = parse_block_error_action(buf, 0);
+ if (on_write_error < 0) {
+ return NULL;
+ }
+ }
+
+ on_read_error = BLOCK_ERR_REPORT;
+ if ((buf = qemu_opt_get(opts, "rerror")) != NULL) {
+ if (type != IF_IDE && type != IF_VIRTIO && type != IF_NONE) {
+ fprintf(stderr, "rerror is no supported by this format\n");
+ return NULL;
+ }
+
+ on_read_error = parse_block_error_action(buf, 1);
+ if (on_read_error < 0) {
+ return NULL;
+ }
+ }
+
+ if ((devaddr = qemu_opt_get(opts, "addr")) != NULL) {
+ if (type != IF_VIRTIO) {
+ fprintf(stderr, "addr is not supported\n");
+ return NULL;
+ }
+ }
+
+ /* compute bus and unit according index */
+
+ if (index != -1) {
+ if (bus_id != 0 || unit_id != -1) {
+ fprintf(stderr,
+ "qemu: index cannot be used with bus and unit\n");
+ return NULL;
+ }
+ if (max_devs == 0)
+ {
+ unit_id = index;
+ bus_id = 0;
+ } else {
+ unit_id = index % max_devs;
+ bus_id = index / max_devs;
+ }
+ }
+
+ /* if user doesn't specify a unit_id,
+ * try to find the first free
+ */
+
+ if (unit_id == -1) {
+ unit_id = 0;
+ while (drive_get(type, bus_id, unit_id) != NULL) {
+ unit_id++;
+ if (max_devs && unit_id >= max_devs) {
+ unit_id -= max_devs;
+ bus_id++;
+ }
+ }
+ }
+
+ /* check unit id */
+
+ if (max_devs && unit_id >= max_devs) {
+ fprintf(stderr, "qemu: unit %d too big (max is %d)\n",
+ unit_id, max_devs - 1);
+ return NULL;
+ }
+
+ /*
+ * ignore multiple definitions
+ */
+
+ if (drive_get(type, bus_id, unit_id) != NULL) {
+ *fatal_error = 0;
+ return NULL;
+ }
+
+ /* init */
+
+ dinfo = qemu_mallocz(sizeof(*dinfo));
+ if ((buf = qemu_opts_id(opts)) != NULL) {
+ dinfo->id = qemu_strdup(buf);
+ } else {
+ /* no id supplied -> create one */
+ dinfo->id = qemu_mallocz(32);
+ if (type == IF_IDE || type == IF_SCSI)
+ mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd";
+ if (max_devs)
+ snprintf(dinfo->id, 32, "%s%i%s%i",
+ devname, bus_id, mediastr, unit_id);
+ else
+ snprintf(dinfo->id, 32, "%s%s%i",
+ devname, mediastr, unit_id);
+ }
+ dinfo->bdrv = bdrv_new(dinfo->id);
+ dinfo->devaddr = devaddr;
+ dinfo->type = type;
+ dinfo->bus = bus_id;
+ dinfo->unit = unit_id;
+ dinfo->on_read_error = on_read_error;
+ dinfo->on_write_error = on_write_error;
+ dinfo->opts = opts;
+ if (serial)
+ strncpy(dinfo->serial, serial, sizeof(serial));
+ QTAILQ_INSERT_TAIL(&drives, dinfo, next);
+
+ switch(type) {
+ case IF_IDE:
+ case IF_SCSI:
+ case IF_XEN:
+ case IF_NONE:
+ switch(media) {
+ case MEDIA_DISK:
+ if (cyls != 0) {
+ bdrv_set_geometry_hint(dinfo->bdrv, cyls, heads, secs);
+ bdrv_set_translation_hint(dinfo->bdrv, translation);
+ }
+ break;
+ case MEDIA_CDROM:
+ bdrv_set_type_hint(dinfo->bdrv, BDRV_TYPE_CDROM);
+ break;
+ }
+ break;
+ case IF_SD:
+ /* FIXME: This isn't really a floppy, but it's a reasonable
+ approximation. */
+ case IF_FLOPPY:
+ bdrv_set_type_hint(dinfo->bdrv, BDRV_TYPE_FLOPPY);
+ break;
+ case IF_PFLASH:
+ case IF_MTD:
+ break;
+ case IF_VIRTIO:
+ /* add virtio block device */
+ opts = qemu_opts_create(&qemu_device_opts, NULL, 0);
+ qemu_opt_set(opts, "driver", "virtio-blk-pci");
+ qemu_opt_set(opts, "drive", dinfo->id);
+ if (devaddr)
+ qemu_opt_set(opts, "addr", devaddr);
+ break;
+ case IF_COUNT:
+ abort();
+ }
+ if (!file) {
+ *fatal_error = 0;
+ return NULL;
+ }
+ if (snapshot) {
+ /* always use cache=unsafe with snapshot */
+ bdrv_flags &= ~BDRV_O_CACHE_MASK;
+ bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH);
+ }
+
+ if (media == MEDIA_CDROM) {
+ /* CDROM is fine for any interface, don't check. */
+ ro = 1;
+ } else if (ro == 1) {
+ if (type != IF_SCSI && type != IF_VIRTIO && type != IF_FLOPPY && type != IF_NONE) {
+ fprintf(stderr, "qemu: readonly flag not supported for drive with this interface\n");
+ return NULL;
+ }
+ }
+
+ bdrv_flags |= ro ? 0 : BDRV_O_RDWR;
+
+ ret = bdrv_open(dinfo->bdrv, file, bdrv_flags, drv);
+ if (ret < 0) {
+ fprintf(stderr, "qemu: could not open disk image %s: %s\n",
+ file, strerror(-ret));
+ return NULL;
+ }
+
+ if (bdrv_key_required(dinfo->bdrv))
+ autostart = 0;
+ *fatal_error = 0;
+ return dinfo;
+}
+
+void do_commit(Monitor *mon, const QDict *qdict)
+{
+ int all_devices;
+ DriveInfo *dinfo;
+ const char *device = qdict_get_str(qdict, "device");
+
+ all_devices = !strcmp(device, "all");
+ QTAILQ_FOREACH(dinfo, &drives, next) {
+ if (!all_devices)
+ if (strcmp(bdrv_get_device_name(dinfo->bdrv), device))
+ continue;
+ bdrv_commit(dinfo->bdrv);
+ }
+}
+
+static int eject_device(Monitor *mon, BlockDriverState *bs, int force)
+{
+ if (bdrv_is_inserted(bs)) {
+ if (!force) {
+ if (!bdrv_is_removable(bs)) {
+ qerror_report(QERR_DEVICE_NOT_REMOVABLE,
+ bdrv_get_device_name(bs));
+ return -1;
+ }
+ if (bdrv_is_locked(bs)) {
+ qerror_report(QERR_DEVICE_LOCKED, bdrv_get_device_name(bs));
+ return -1;
+ }
+ }
+ bdrv_close(bs);
+ }
+ return 0;
+}
+
+int do_eject(Monitor *mon, const QDict *qdict, QObject **ret_data)
+{
+ BlockDriverState *bs;
+ int force = qdict_get_int(qdict, "force");
+ const char *filename = qdict_get_str(qdict, "device");
+
+ bs = bdrv_find(filename);
+ if (!bs) {
+ qerror_report(QERR_DEVICE_NOT_FOUND, filename);
+ return -1;
+ }
+ return eject_device(mon, bs, force);
+}
+
+int do_block_set_passwd(Monitor *mon, const QDict *qdict,
+ QObject **ret_data)
+{
+ BlockDriverState *bs;
+ int err;
+
+ bs = bdrv_find(qdict_get_str(qdict, "device"));
+ if (!bs) {
+ qerror_report(QERR_DEVICE_NOT_FOUND, qdict_get_str(qdict, "device"));
+ return -1;
+ }
+
+ err = bdrv_set_key(bs, qdict_get_str(qdict, "password"));
+ if (err == -EINVAL) {
+ qerror_report(QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs));
+ return -1;
+ } else if (err < 0) {
+ qerror_report(QERR_INVALID_PASSWORD);
+ return -1;
+ }
+
+ return 0;
+}
+
+int do_change_block(Monitor *mon, const char *device,
+ const char *filename, const char *fmt)
+{
+ BlockDriverState *bs;
+ BlockDriver *drv = NULL;
+ int bdrv_flags;
+
+ bs = bdrv_find(device);
+ if (!bs) {
+ qerror_report(QERR_DEVICE_NOT_FOUND, device);
+ return -1;
+ }
+ if (fmt) {
+ drv = bdrv_find_whitelisted_format(fmt);
+ if (!drv) {
+ qerror_report(QERR_INVALID_BLOCK_FORMAT, fmt);
+ return -1;
+ }
+ }
+ if (eject_device(mon, bs, 0) < 0) {
+ return -1;
+ }
+ bdrv_flags = bdrv_get_type_hint(bs) == BDRV_TYPE_CDROM ? 0 : BDRV_O_RDWR;
+ if (bdrv_open(bs, filename, bdrv_flags, drv) < 0) {
+ qerror_report(QERR_OPEN_FILE_FAILED, filename);
+ return -1;
+ }
+ return monitor_read_bdrv_key_start(mon, bs, NULL, NULL);
+}
