similar to: [PATCH v2 0/7] vhost-scsi: Fix crashes and management op hangs

The following patches were made over Linus tree and also apply over mst tree's vhost branch. The patches fix an issue where management operations like LUN mapping/unmapping and device addition hang for 30 seconds or up to N minutes depending on the device. The problem is that we use a global mutex to protect the list of tpgs but we hold that mutex during those management operations. So if you

We don't need the vhost_scsi_mutex in vhost_scsi_port_link and vhost_scsi_port_unlink because LIO has a refcount on the se_tpg for us, so it can't be removed while these functions are called. This removes the vhost_scsi_mutex from those functions to avoid cases where we are adding or removing LUNs to vhost-deviceA but are stuck waiting on the vhost_scsi_mutex because we are running

The following patches were made over Linus's tree and fix an issue where windows guests will send iovecs with offset/lengths that result in IOs that are not aligned to 512. The LIO layer will then send them to Linux's block layer but it requires 512 byte alignment, so depending on the block driver being used we will get IO errors or hung IO. The following patches have vhost-scsi detect

From: Markus Elfring <elfring at users.sourceforge.net> Date: Sat, 20 May 2017 16:25:04 +0200 A few update suggestions were taken into account from static source code analysis. Markus Elfring (2): Improve a size determination in four functions Delete error messages for failed memory allocations in five functions drivers/vhost/scsi.c | 33 +++++++++++---------------------- 1 file

From: Markus Elfring <elfring at users.sourceforge.net> Date: Sat, 20 May 2017 16:25:04 +0200 A few update suggestions were taken into account from static source code analysis. Markus Elfring (2): Improve a size determination in four functions Delete error messages for failed memory allocations in five functions drivers/vhost/scsi.c | 33 +++++++++++---------------------- 1 file

Asias He (5): vhost-scsi: Remove unnecessary forward struct vhost_scsi declaration vhost-scsi: Rename struct vhost_scsi *s to *vs vhost-scsi: Make func indention more consistent vhost-scsi: Rename struct tcm_vhost_tpg *tv_tpg to *tpg vhost-scsi: Rename struct tcm_vhost_cmd *tv_cmd to *cmd drivers/vhost/scsi.c | 469 +++++++++++++++++++++++++++------------------------ 1 file changed,

Asias He (5): vhost-scsi: Remove unnecessary forward struct vhost_scsi declaration vhost-scsi: Rename struct vhost_scsi *s to *vs vhost-scsi: Make func indention more consistent vhost-scsi: Rename struct tcm_vhost_tpg *tv_tpg to *tpg vhost-scsi: Rename struct tcm_vhost_cmd *tv_cmd to *cmd drivers/vhost/scsi.c | 469 +++++++++++++++++++++++++++------------------------ 1 file changed,

MST, This is on top of [PATCH 0/2] vhost-net fix ubuf. Asias He (11): vhost: Remove vhost_enable_zcopy in vhost.h vhost: Move VHOST_NET_FEATURES to net.c vhost: Make vhost a separate module vhost: Remove comments for hdr in vhost.h vhost: Simplify dev->vqs[i] access vhost-net: Cleanup vhost_ubuf and vhost_zcopy vhost-scsi: Remove unnecessary forward struct vhost_scsi declaration

MST, This is on top of [PATCH 0/2] vhost-net fix ubuf. Asias He (11): vhost: Remove vhost_enable_zcopy in vhost.h vhost: Move VHOST_NET_FEATURES to net.c vhost: Make vhost a separate module vhost: Remove comments for hdr in vhost.h vhost: Simplify dev->vqs[i] access vhost-net: Cleanup vhost_ubuf and vhost_zcopy vhost-scsi: Remove unnecessary forward struct vhost_scsi declaration

The following patches were built over linux-next which contains various vhost patches in mst's tree and the vhost_task patchset in Christian Brauner's tree: git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux.git kernel.user_worker branch: https://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux.git/log/?h=kernel.user_worker The latter patchset handles the review comment

From: Nicholas Bellinger <nab at linux-iscsi.org> Hi folks, The following is the RFC-v3 series of tcm_vhost target fabric driver code currently in-flight for-3.6 mainline code. With the merge window opening soon, the tcm_vhost code has started seeing time in linux-next. The v2 -> v3 changelog from the last week is currently looking like: *) Unlock on error in tcm_vhost_drop_nexus()

From: Nicholas Bellinger <nab at linux-iscsi.org> Hi folks, The following is the RFC-v3 series of tcm_vhost target fabric driver code currently in-flight for-3.6 mainline code. With the merge window opening soon, the tcm_vhost code has started seeing time in linux-next. The v2 -> v3 changelog from the last week is currently looking like: *) Unlock on error in tcm_vhost_drop_nexus()

From: Nicholas Bellinger <nab at linux-iscsi.org> Hi MST, Greg-KH & Co, The following is -v4 of the in-flight TCM vhost fabric driver for-3.6 code. This series has been rebased into target-pending.git/for-next-merge this evening, and the changelog over the last days from v3 -> v4 has been: *) Rename vhost_vring_target -> vhost_scsi_target (mst + nab) *) Use TRANSPORT_IQN_LEN

From: Nicholas Bellinger <nab at linux-iscsi.org> Hi MST, Greg-KH & Co, The following is -v4 of the in-flight TCM vhost fabric driver for-3.6 code. This series has been rebased into target-pending.git/for-next-merge this evening, and the changelog over the last days from v3 -> v4 has been: *) Rename vhost_vring_target -> vhost_scsi_target (mst + nab) *) Use TRANSPORT_IQN_LEN

From: Nicholas Bellinger <nab at linux-iscsi.org> Hi folks, The following is a RFC-v2 series of tcm_vhost target fabric driver code currently in-flight for-3.6 mainline code. After last week's developments along with the help of some new folks, the changelog v1 -> v2 so far looks like: *) Fix drivers/vhost/test.c to use VHOST_NET_FEATURES in patch #1 (Asias He) *) Fix tv_cmd

From: Nicholas Bellinger <nab at linux-iscsi.org> Hi folks, The following is a RFC-v2 series of tcm_vhost target fabric driver code currently in-flight for-3.6 mainline code. After last week's developments along with the help of some new folks, the changelog v1 -> v2 so far looks like: *) Fix drivers/vhost/test.c to use VHOST_NET_FEATURES in patch #1 (Asias He) *) Fix tv_cmd

Asias He (4): tcm_vhost: Refactor the lock nesting rule tcm_vhost: Add hotplug/hotunplug support tcm_vhost: Add ioctl to get and set events missed flag tcm_vhost: Enable VIRTIO_SCSI_F_HOTPLUG drivers/vhost/tcm_vhost.c | 262 +++++++++++++++++++++++++++++++++++++++++++--- drivers/vhost/tcm_vhost.h | 13 +++ 2 files changed, 259 insertions(+), 16 deletions(-) -- 1.8.1.4

Asias He (4): tcm_vhost: Refactor the lock nesting rule tcm_vhost: Add hotplug/hotunplug support tcm_vhost: Add ioctl to get and set events missed flag tcm_vhost: Enable VIRTIO_SCSI_F_HOTPLUG drivers/vhost/tcm_vhost.c | 262 +++++++++++++++++++++++++++++++++++++++++++--- drivers/vhost/tcm_vhost.h | 13 +++ 2 files changed, 259 insertions(+), 16 deletions(-) -- 1.8.1.4

From: Nicholas Bellinger <nab at linux-iscsi.org> Hello KVM + QEMU folks, This is -v5 of the in-flight tcm_vhost fabric driver for KVM host virtualized target support using the in-kernel storage stack with for-3.6 code. The changes since -v4 have been pretty minimal. A new GET_ABI_VERSION ioctl has been added as requested by Anthony & Co, and after some back <-> forth on the

From: Nicholas Bellinger <nab at linux-iscsi.org> Hello KVM + QEMU folks, This is -v5 of the in-flight tcm_vhost fabric driver for KVM host virtualized target support using the in-kernel storage stack with for-3.6 code. The changes since -v4 have been pretty minimal. A new GET_ABI_VERSION ioctl has been added as requested by Anthony & Co, and after some back <-> forth on the