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Revision c589b249

IDc589b24972794a92fe3b5d6b9f4f09ef29e95460

Added by Ronnie Sahlberg over 12 years ago

iSCSI block driver

This provides built-in support for iSCSI to QEMU.

This has the advantage that the iSCSI devices need not be made visible to the host, which is useful if you have very many virtual machines and very many iscsi devices.
It also has the benefit that non-root users of QEMU can access iSCSI devices across the network without requiring root privilege on the host.

This driver interfaces with the multiplatform posix library for iscsi initiator/client access to iscsi devices hosted at
git://github.com/sahlberg/libiscsi.git

The patch adds the driver to interface with the iscsi library.
It also updated the configure script to
  • by default, probe is libiscsi is available and if so, build
    qemu against libiscsi.
  • --enable-libiscsi
    Force a build against libiscsi. If libiscsi is not available
    the build will fail.
  • --disable-libiscsi
    Do not link against libiscsi, even if it is available.

When linked with libiscsi, qemu gains support to access iscsi resources such as disks and cdrom directly, without having to make the devices visible to the host.

You can specify devices using a iscsi url of the form :
iscsi://[<username>[:<password>@]]<host>[:<port]/<target-iqn-name>/<lun>
When using authentication, the password can optionally be set with
LIBISCSI_CHAP_PASSWORD="password" to avoid it showing up in the process list

Signed-off-by: Ronnie Sahlberg <>
Reviewed-by: Stefan Hajnoczi <>
Signed-off-by: Kevin Wolf <>

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