/* * QEMU System Emulator block driver * * Copyright (c) 2003 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 "vl.h" #include "block_int.h" static BlockDriverState *bdrv_first; static BlockDriver *first_drv; void bdrv_register(BlockDriver *bdrv) { bdrv->next = first_drv; first_drv = bdrv; } /* create a new block device (by default it is empty) */ BlockDriverState *bdrv_new(const char *device_name) { BlockDriverState **pbs, *bs; bs = qemu_mallocz(sizeof(BlockDriverState)); if(!bs) return NULL; pstrcpy(bs->device_name, sizeof(bs->device_name), device_name); if (device_name[0] != '\0') { /* insert at the end */ pbs = &bdrv_first; while (*pbs != NULL) pbs = &(*pbs)->next; *pbs = bs; } return bs; } BlockDriver *bdrv_find_format(const char *format_name) { BlockDriver *drv1; for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { if (!strcmp(drv1->format_name, format_name)) return drv1; } return NULL; } int bdrv_create(BlockDriver *drv, const char *filename, int64_t size_in_sectors, const char *backing_file, int flags) { if (!drv->bdrv_create) return -ENOTSUP; return drv->bdrv_create(filename, size_in_sectors, backing_file, flags); } static BlockDriver *find_image_format(const char *filename) { int fd, ret, score, score_max; BlockDriver *drv1, *drv; uint8_t buf[1024]; fd = open(filename, O_RDONLY | O_BINARY | O_LARGEFILE); if (fd < 0) return NULL; ret = read(fd, buf, sizeof(buf)); if (ret < 0) { close(fd); return NULL; } close(fd); drv = NULL; score_max = 0; for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { score = drv1->bdrv_probe(buf, ret, filename); if (score > score_max) { score_max = score; drv = drv1; } } return drv; } int bdrv_open(BlockDriverState *bs, const char *filename, int snapshot) { return bdrv_open2(bs, filename, snapshot, NULL); } int bdrv_open2(BlockDriverState *bs, const char *filename, int snapshot, BlockDriver *drv) { int ret; bs->read_only = 0; bs->is_temporary = 0; bs->encrypted = 0; pstrcpy(bs->filename, sizeof(bs->filename), filename); if (!drv) { drv = find_image_format(filename); if (!drv) return -1; } bs->drv = drv; bs->opaque = qemu_mallocz(drv->instance_size); if (bs->opaque == NULL && drv->instance_size > 0) return -1; ret = drv->bdrv_open(bs, filename); if (ret < 0) { qemu_free(bs->opaque); return -1; } #ifndef _WIN32 if (bs->is_temporary) { unlink(filename); } #endif if (bs->backing_file[0] != '\0' && drv->bdrv_is_allocated) { /* if there is a backing file, use it */ bs->backing_hd = bdrv_new(""); if (!bs->backing_hd) { fail: bdrv_close(bs); return -1; } if (bdrv_open(bs->backing_hd, bs->backing_file, 0) < 0) goto fail; } bs->inserted = 1; /* call the change callback */ if (bs->change_cb) bs->change_cb(bs->change_opaque); return 0; } void bdrv_close(BlockDriverState *bs) { if (bs->inserted) { if (bs->backing_hd) bdrv_delete(bs->backing_hd); bs->drv->bdrv_close(bs); qemu_free(bs->opaque); #ifdef _WIN32 if (bs->is_temporary) { unlink(bs->filename); } #endif bs->opaque = NULL; bs->drv = NULL; bs->inserted = 0; /* call the change callback */ if (bs->change_cb) bs->change_cb(bs->change_opaque); } } void bdrv_delete(BlockDriverState *bs) { /* XXX: remove the driver list */ bdrv_close(bs); qemu_free(bs); } /* commit COW file into the raw image */ int bdrv_commit(BlockDriverState *bs) { int64_t i; int n, j; unsigned char sector[512]; if (!bs->inserted) return -ENOENT; if (bs->read_only) { return -EACCES; } if (!bs->backing_hd) { return -ENOTSUP; } for (i = 0; i < bs->total_sectors;) { if (bs->drv->bdrv_is_allocated(bs, i, 65536, &n)) { for(j = 0; j < n; j++) { if (bdrv_read(bs, i, sector, 1) != 0) { return -EIO; } if (bdrv_write(bs->backing_hd, i, sector, 1) != 0) { return -EIO; } i++; } } else { i += n; } } return 0; } /* return -1 if error */ int bdrv_read(BlockDriverState *bs, int64_t sector_num, uint8_t *buf, int nb_sectors) { int ret, n; BlockDriver *drv = bs->drv; if (!bs->inserted) return -1; while (nb_sectors > 0) { if (sector_num == 0 && bs->boot_sector_enabled) { memcpy(buf, bs->boot_sector_data, 512); n = 1; } else if (bs->backing_hd) { if (drv->bdrv_is_allocated(bs, sector_num, nb_sectors, &n)) { ret = drv->bdrv_read(bs, sector_num, buf, n); if (ret < 0) return -1; } else { /* read from the base image */ ret = bdrv_read(bs->backing_hd, sector_num, buf, n); if (ret < 0) return -1; } } else { ret = drv->bdrv_read(bs, sector_num, buf, nb_sectors); if (ret < 0) return -1; /* no need to loop */ break; } nb_sectors -= n; sector_num += n; buf += n * 512; } return 0; } /* return -1 if error */ int bdrv_write(BlockDriverState *bs, int64_t sector_num, const uint8_t *buf, int nb_sectors) { if (!bs->inserted) return -1; if (bs->read_only) return -1; return bs->drv->bdrv_write(bs, sector_num, buf, nb_sectors); } void bdrv_get_geometry(BlockDriverState *bs, int64_t *nb_sectors_ptr) { *nb_sectors_ptr = bs->total_sectors; } /* force a given boot sector. */ void bdrv_set_boot_sector(BlockDriverState *bs, const uint8_t *data, int size) { bs->boot_sector_enabled = 1; if (size > 512) size = 512; memcpy(bs->boot_sector_data, data, size); memset(bs->boot_sector_data + size, 0, 512 - size); } void bdrv_set_geometry_hint(BlockDriverState *bs, int cyls, int heads, int secs) { bs->cyls = cyls; bs->heads = heads; bs->secs = secs; } void bdrv_set_type_hint(BlockDriverState *bs, int type) { bs->type = type; bs->removable = ((type == BDRV_TYPE_CDROM || type == BDRV_TYPE_FLOPPY)); } void bdrv_get_geometry_hint(BlockDriverState *bs, int *pcyls, int *pheads, int *psecs) { *pcyls = bs->cyls; *pheads = bs->heads; *psecs = bs->secs; } int bdrv_get_type_hint(BlockDriverState *bs) { return bs->type; } int bdrv_is_removable(BlockDriverState *bs) { return bs->removable; } int bdrv_is_read_only(BlockDriverState *bs) { return bs->read_only; } int bdrv_is_inserted(BlockDriverState *bs) { return bs->inserted; } int bdrv_is_locked(BlockDriverState *bs) { return bs->locked; } void bdrv_set_locked(BlockDriverState *bs, int locked) { bs->locked = locked; } void bdrv_set_change_cb(BlockDriverState *bs, void (*change_cb)(void *opaque), void *opaque) { bs->change_cb = change_cb; bs->change_opaque = opaque; } int bdrv_is_encrypted(BlockDriverState *bs) { if (bs->backing_hd && bs->backing_hd->encrypted) return 1; return bs->encrypted; } int bdrv_set_key(BlockDriverState *bs, const char *key) { int ret; if (bs->backing_hd && bs->backing_hd->encrypted) { ret = bdrv_set_key(bs->backing_hd, key); if (ret < 0) return ret; if (!bs->encrypted) return 0; } if (!bs->encrypted || !bs->drv || !bs->drv->bdrv_set_key) return -1; return bs->drv->bdrv_set_key(bs, key); } void bdrv_get_format(BlockDriverState *bs, char *buf, int buf_size) { if (!bs->inserted || !bs->drv) { buf[0] = '\0'; } else { pstrcpy(buf, buf_size, bs->drv->format_name); } } void bdrv_iterat
#
# Copyright (C) 2010 OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#

VIRTUAL_MENU:=Virtualization Support

define KernelPackage/virtio-balloon
  SUBMENU:=$(VIRTUAL_MENU)
  TITLE:=VirtIO balloon driver
  DEPENDS:=@TARGET_x86_kvm_guest
  KCONFIG:=CONFIG_VIRTIO_BALLOON
  FILES:=$(LINUX_DIR)/drivers/virtio/virtio_balloon.ko
  AUTOLOAD:=$(call AutoLoad,06,virtio-balloon)
endef

define KernelPackage/virtio-balloon/description
 Kernel module for VirtIO memory ballooning support
endef

$(eval $(call KernelPackage,virtio-balloon))


define KernelPackage/virtio-net
  SUBMENU:=$(VIRTUAL_MENU)
  TITLE:=VirtIO network driver
  DEPENDS:=@TARGET_x86_kvm_guest
  KCONFIG:=CONFIG_VIRTIO_NET
  FILES:=$(LINUX_DIR)/drivers/net/virtio_net.ko
  AUTOLOAD:=$(call AutoLoad,50,virtio_net)
endef

define KernelPackage/virtio-net/description
 Kernel module for the VirtIO paravirtualized network device
endef

$(eval $(call KernelPackage,virtio-net))


define KernelPackage/virtio-random
  SUBMENU:=$(VIRTUAL_MENU)
  TITLE:=VirtIO Random Number Generator support
  DEPENDS:=@TARGET_x86_kvm_guest
  KCONFIG:=CONFIG_HW_RANDOM_VIRTIO
  FILES:=$(LINUX_DIR)/drivers/char/hw_random/virtio-rng.ko
  AUTOLOAD:=$(call AutoLoad,09,virtio-rng)
endef

define KernelPackage/virtio-random/description
 Kernel module for the VirtIO Random Number Generator
endef

$(eval $(call KernelPackage,virtio-random))

define KernelPackage/xen-fs
  SUBMENU:=$(VIRTUAL_MENU)
  TITLE:=Xen filesystem
  DEPENDS:=@TARGET_x86_xen_domu
  KCONFIG:= \
  	CONFIG_XENFS \
  	CONFIG_XEN_COMPAT_XENFS=y
  FILES:=$(LINUX_DIR)/drivers/xen/xenfs/xenfs.ko
  AUTOLOAD:=$(call AutoLoad,05,xenfs)
endef

define KernelPackage/xen-fs/description
 Kernel module for the Xen filesystem
endef

$(eval $(call KernelPackage,xen-fs))


define KernelPackage/xen-evtchn
  SUBMENU:=$(VIRTUAL_MENU)
  TITLE:=Xen event channels
  DEPENDS:=@TARGET_x86_xen_domu
  KCONFIG:=CONFIG_XEN_DEV_EVTCHN
  FILES:=$(LINUX_DIR)/drivers/xen/xen-evtchn.ko
  AUTOLOAD:=$(call AutoLoad,06,xen-evtchn)
endef

define KernelPackage/xen-evtchn/description
 Kernel module for the /dev/xen/evtchn device
endef

$(eval $(call KernelPackage,xen-evtchn))

define KernelPackage/xen-fbdev
  SUBMENU:=$(VIRTUAL_MENU)
  TITLE:=Xen virtual frame buffer
  DEPENDS:=@TARGET_x86_xen_domu +kmod-fb
  KCONFIG:= \
  	CONFIG_XEN_FBDEV_FRONTEND \
  	CONFIG_FB_DEFERRED_IO=y \
  	CONFIG_FB_SYS_COPYAREA \
  	CONFIG_FB_SYS_FILLRECT \
  	CONFIG_FB_SYS_FOPS \
  	CONFIG_FB_SYS_IMAGEBLIT \
  	CONFIG_FIRMWARE_EDID=n
  FILES:= \
  	$(LINUX_DIR)/drivers/video/xen-fbfront.ko \
  	$(LINUX_DIR)/drivers/video/syscopyarea.ko \
  	$(LINUX_DIR)/drivers/video/sysfillrect.ko \
  	$(LINUX_DIR)/drivers/video/fb_sys_fops.ko \
  	$(LINUX_DIR)/drivers/video/sysimgblt.ko
  AUTOLOAD:=$(call AutoLoad,07, \
  	fb \
  	syscopyarea \
  	sysfillrect \
  	fb_sys_fops \
  	sysimgblt \
  	xen-fbfront \
  )
endef

define KernelPackage/xen-fbdev/description
 Kernel module for the Xen virtual frame buffer
endef

$(eval $(call KernelPackage,xen-fbdev))


define KernelPackage/xen-kbddev
  SUBMENU:=$(VIRTUAL_MENU)
  TITLE:=Xen virtual keyboard and mouse
  DEPENDS:=@TARGET_x86_xen_domu
  KCONFIG:=CONFIG_XEN_KBDDEV_FRONTEND
  FILES:=$(LINUX_DIR)/drivers/input/xen-kbdfront.ko
  AUTOLOAD:=$(call AutoLoad,08,xen-kbdfront)
endef

define KernelPackage/xen-kbddev/description
 Kernel module for the Xen virtual keyboard and mouse
endef

$(eval $(call KernelPackage,xen-kbddev))


define KernelPackage/xen-netdev
  SUBMENU:=$(VIRTUAL_MENU)
  TITLE:=Xen network device frontend
  DEPENDS:=@TARGET_x86_xen_domu
  KCONFIG:=CONFIG_XEN_NETDEV_FRONTEND
  FILES:=$(LINUX_DIR)/drivers/net/xen-netfront.ko
  AUTOLOAD:=$(call AutoLoad,09,xen-netfront)
endef

define KernelPackage/xen-netdev/description
 Kernel module for the Xen network device frontend
endef

$(eval $(call KernelPackage,xen-netdev))


define KernelPackage/xen-pcidev
  SUBMENU:=$(VIRTUAL_MENU)
  TITLE:=Xen PCI device frontend
  DEPENDS:=@TARGET_x86_xen_domu
  KCONFIG:=CONFIG_XEN_PCIDEV_FRONTEND
  FILES:=$(LINUX_DIR)/drivers/pci/xen-pcifront.ko
  AUTOLOAD:=$(call AutoLoad,10,xen-pcifront)
endef

define KernelPackage/xen-pcidev/description
 Kernel module for the Xen network device frontend
endef

$(eval $(call KernelPackage,xen-pcidev))
generated by cgit v1.2.3 (git 2.25.1) at 2026-01-18 10:58:10 +0000