Pull scsi target updates from Nicholas Bellinger:
"Things have been calm for the most part with no new fabric drivers in
flight for v3.7 (we're up to eight now !), so this update is primarily
focused on addressing a few long-standing items within target-core and
iscsi-target fabric code.
The highlights include:
- target: Simplify fabric sense data length handling (roland)
- qla2xxx: Fix endianness of task management response code (roland)
- target: fix truncation of mode data, support zero allocation length
(paolo)
- target: Properly support zero-length commands in normal processing
path (paolo)
- iscsi-target: Correctly set 0xffffffff field within ISCSI_OP_REJECT
PDU (ronnie + nab)
- iscsi-target: Add explicit set of cache_dynamic_acls=1 for TPG
demo-mode (ronnie + nab)
- target/file: Re-enable optional fd_buffered_io=1 operation (nab +
hch)
- iscsi-target: Add MaxXmitDataSegmenthLength forr target ->
initiator MDRSL declaration (nab)
- target: Add target_submit_cmd_map_sgls for SGL fabric memory
passthrough (nab + hch)
- tcm_loop: Convert I/O path to use target_submit_cmd_map_sgls (hch +
nab)
- tcm_vhost: Convert I/O path to use target_submit_cmd_map_sgls (nab
+ hch)
The last series for adding a new target_submit_cmd_map_sgls() fabric
caller (as requested by hch) that accepts pre-allocated SGL memory
(using existing logic), along with converting tcm_loop + tcm_vhost has
only been in -next for the last days, but has gotten enough review
+testing and is clear enough a mechanical change that I think it's
reasonable to merge for -rc1 code.
Thanks again to everyone who contributed this round! Extra special
thanks to Roland (PureStorage) for tracking down the qla2xxx target
TMR response code endian issue, and to Paolo (Redhat) for resolving
the long standing zero-length CDB issues within target-core between
virtual and pSCSI backends."
* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (44 commits)
iscsi-target: Bump defaults for nopin_timeout + nopin_response_timeout values
iscsit: proper endianess conversions
iscsit: use the itt_t abstract type
iscsit: add missing endianess conversion in iscsit_check_inaddr_any
iscsit: remove incorrect unlock in iscsit_build_sendtargets_resp
iscsit: mark various functions static
target/iscsi: precedence bug in iscsit_set_dataout_sequence_values()
target/usb-gadget: strlen() doesn't count the terminator
target/usb-gadget: remove duplicate initialization
tcm_vhost: Convert I/O path to use target_submit_cmd_map_sgls
target: Add control CDB READ payload zero work-around
tcm_loop: Convert I/O path to use target_submit_cmd_map_sgls
target: Add target_submit_cmd_map_sgls for SGL fabric memory passthrough
iscsi-target: Add explicit set of cache_dynamic_acls=1 for TPG demo-mode
iscsi-target: Change iscsi_target_seq_pdu_list.c to honor MaxXmitDataSegmentLength
iscsi-target: Add MaxXmitDataSegmentLength connection recovery check
iscsi-target: Convert incoming PDU payload checks to MaxXmitDataSegmentLength
iscsi-target: Enable MaxXmitDataSegmentLength operation in login path
iscsi-target: Add base MaxXmitDataSegmentLength code
target/file: Re-enable optional fd_buffered_io=1 operation
...
RX/TX CQs will now be selected from a per HCA pool. For the RX flow
this has the effect of using different interrupt vectors when using
low level drivers (such as mlx4) that map the "vector" param provided
by the ULP on CQ creation to a dedicated IRQ/MSI-X vector. This
allows the RX flow processing of IO responses to be distributed across
multiple CPUs.
QPs (--> iSER sessions) are assigned to CQs in round robin order using
the CQ with the minimum number of sessions attached to it.
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Alex Tabachnik <alext@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
With the new netlink support in commit 862096a8bb ("IB/ipoib: Add more
rtnl_link_ops callbacks") we need ipoib_set_mode() to be available even
if connected mode isn't built. Move the function from ipoib_cm.c to
ipoib_main.c (and make a few CM-related macros available unconditonally).
This fixes the build error
drivers/built-in.o: In function 'ipoib_changelink':
ipoib_netlink.c:(.text+0x6a5fc9): undefined reference to 'ipoib_set_mode'
ipoib_netlink.c:(.text+0x6a5fe3): undefined reference to 'ipoib_set_mode'
when CONFIG_INFINIBAND_IPOIB_CM isn't set.
Reported-by: Randy Dunlap <rdunlap@xenotime.net>
Reported-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Roland Dreier <roland@purestorage.com>
- mlx4 IB support for SR-IOV
- A couple of SRP initiator fixes
- Batch of nes hardware driver fixes
- Fix for long-standing use-after-free crash in IPoIB
- Other miscellaneous fixes
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Merge tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband
Pull infiniband updates from Roland Dreier:
"First batch of InfiniBand/RDMA changes for the 3.7 merge window:
- mlx4 IB support for SR-IOV
- A couple of SRP initiator fixes
- Batch of nes hardware driver fixes
- Fix for long-standing use-after-free crash in IPoIB
- Other miscellaneous fixes"
This merge also removes a new use of __cancel_delayed_work(), and
replaces it with the regular cancel_delayed_work() that is now irq-safe
thanks to the workqueue updates.
That said, I suspect the sequence in question should probably use
"mod_delayed_work()". I just did the minimal "don't use deprecated
functions" fixup, though.
* tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband: (45 commits)
IB/qib: Fix local access validation for user MRs
mlx4_core: Disable SENSE_PORT for multifunction devices
mlx4_core: Clean up enabling of SENSE_PORT for older (ConnectX-1/-2) HCAs
mlx4_core: Stash PCI ID driver_data in mlx4_priv structure
IB/srp: Avoid having aborted requests hang
IB/srp: Fix use-after-free in srp_reset_req()
IB/qib: Add a qib driver version
RDMA/nes: Fix compilation error when nes_debug is enabled
RDMA/nes: Print hardware resource type
RDMA/nes: Fix for crash when TX checksum offload is off
RDMA/nes: Cosmetic changes
RDMA/nes: Fix for incorrect MSS when TSO is on
RDMA/nes: Fix incorrect resolving of the loopback MAC address
mlx4_core: Fix crash on uninitialized priv->cmd.slave_sem
mlx4_core: Trivial cleanups to driver log messages
mlx4_core: Trivial readability fix: "0X30" -> "0x30"
IB/mlx4: Create paravirt contexts for VFs when master IB driver initializes
mlx4: Modify proxy/tunnel QP mechanism so that guests do no calculations
mlx4: Paravirtualize Node Guids for slaves
mlx4: Activate SR-IOV mode for IB
...
Add the rtnl_link_ops changelink and fill_info callbacks, through
which the admin can now set/get the driver mode, etc policies.
Maintain the proprietary sysfs entries only for legacy childs.
For child devices, set dev->iflink to point to the parent
device ifindex, such that user space tools can now correctly
show the uplink relation as done for vlan, macvlan, etc
devices. Pointed out by Patrick McHardy <kaber@trash.net>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
We need to call scsi_done() for commands after we abort them.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: David Dillow <dillowda@ornl.gov>
Cc: <stable@vger.kernel.org>
Signed-off-by: Roland Dreier <roland@purestorage.com>
srp_free_req() uses the scsi_cmnd structure contents to unmap
buffers, so we must invoke srp_free_req() before we release
ownership of that structure.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: David Dillow <dillowda@ornl.gov>
Cc: <stable@vger.kernel.org>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Fix a crash in ipoib_mcast_join_task(). (with help from Or Gerlitz)
Commit c8c2afe360 ("IPoIB: Use rtnl lock/unlock when changing device
flags") added a call to rtnl_lock() in ipoib_mcast_join_task(), which
is run from the ipoib_workqueue, and hence the workqueue can't be
flushed from the context of ipoib_stop().
In the current code, ipoib_stop() (which doesn't flush the workqueue)
calls ipoib_mcast_dev_flush(), which goes and deletes all the
multicast entries. This takes place without any synchronization with
a possible running instance of ipoib_mcast_join_task() for the same
ipoib device, leading to a crash due to NULL pointer dereference.
Fix this by making sure that the workqueue is flushed before
ipoib_mcast_dev_flush() is called. To make that possible, we move the
RTNL-lock wrapped code to ipoib_mcast_join_finish().
Signed-off-by: Patrick McHardy <kaber@trash.net>
Cc: <stable@vger.kernel.org>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Conflicts:
drivers/net/team/team.c
drivers/net/usb/qmi_wwan.c
net/batman-adv/bat_iv_ogm.c
net/ipv4/fib_frontend.c
net/ipv4/route.c
net/l2tp/l2tp_netlink.c
The team, fib_frontend, route, and l2tp_netlink conflicts were simply
overlapping changes.
qmi_wwan and bat_iv_ogm were of the "use HEAD" variety.
With help from Antonio Quartulli.
Signed-off-by: David S. Miller <davem@davemloft.net>
Add rtnl_link_ops to IPoIB, with the first usage being child device
create/delete through them. Childs devices are now either legacy ones,
created/deleted through the ipoib sysfs entries, or RTNL ones.
Adding support for RTNL childs involved refactoring of ipoib_vlan_add
which is now used by both the sysfs and the link_ops code.
Also, added ndo_uninit entry to support calling unregister_netdevice_queue
from the rtnl dellink entry. This required removal of calls to
ipoib_dev_cleanup from the driver in flows which use unregister_netdevice,
since the networking core will invoke ipoib_uninit which does exactly that.
Signed-off-by: Erez Shitrit <erezsh@mellanox.co.il>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Every fabric driver has to supply a se_tfo->set_fabric_sense_len()
method, just so iSCSI can return an offset of 2. However, every fabric
driver is already allocating a sense buffer and passing it into the
target core, either via transport_init_se_cmd() or target_submit_cmd().
So instead of having iSCSI pass the start of its sense buffer into the
core and then later tell the core to skip the first 2 bytes, it seems
easier for iSCSI just to do the offset of 2 when it passes the sense
buffer into the core. Then we can drop the se_tfo->set_fabric_sense_len()
everywhere, and just add a couple of lines of code to iSCSI to set the
sense data length to the beginning of the buffer right before it sends
it over the network.
(nab: Remove .set_fabric_sense_len usage from tcm_qla2xxx_npiv_ops +
change transport_get_sense_buffer to follow v3.6-rc6 code w/o
->set_fabric_sense_len usage)
Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
There are no callers of se_tfo->get_fabric_sense_len(), so we should
stop having every fabric driver implement it.
Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Lockdep points out a circular locking dependency betwwen the ipoib
device priv spinlock (priv->lock) and the neighbour table rwlock
(ntbl->rwlock).
In the normal path, ie neigbour garbage collection task, the neigh
table rwlock is taken first and then if the neighbour needs to be
deleted, priv->lock is taken.
However in some error paths, such as in ipoib_cm_handle_tx_wc(),
priv->lock is taken first and then ipoib_neigh_free routine is called
which in turn takes the neighbour table ntbl->rwlock.
The solution is to get rid the neigh table rwlock completely and use
only priv->lock.
Signed-off-by: Shlomo Pongratz <shlomop@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
If the neighbours hash table is empty when unloading the module, then
ipoib_flush_neighs(), the cleanup routine, isn't called and the
memory used for the hash table itself leaked.
To fix this, ipoib_flush_neighs() is allways called, and another
completion object is added to signal when the table is freed.
Once invoked, ipoib_flush_neighs() flushes all the neighbours (if
there are any), calls the the hash table RCU free routine, which now
signals completion of the deletion process, and waits for the last
neighbour to be freed.
Signed-off-by: Shlomo Pongratz <shlomop@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Avoid a crash caused by the scmnd->scsi_done(scmnd) call in
srp_process_rsp() being invoked with scsi_done == NULL. This can
happen if a reply is received during or after a command abort.
Reported-by: Joseph Glanville <joseph.glanville@orionvm.com.au>
Reference: http://marc.info/?l=linux-rdma&m=134314367801595
Cc: <stable@vger.kernel.org>
Acked-by: David Dillow <dillowda@ornl.gov>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Correct spelling typos in comments in drivers/infiniband.
Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Commit b63b70d877 ("IPoIB: Use a private hash table for path lookup
in xmit path") introduced a bug where in ipoib_neigh_free() (which is
called from a few errors flows in the driver), rcu_dereference() is
invoked with the wrong pointer object, which results in a crash.
Signed-off-by: Shlomo Pongratz <shlomop@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Commit b63b70d877 ("IPoIB: Use a private hash table for path lookup
in xmit path") introduced a bug where in ipoib_cm_destroy_tx() a CM
object is moved between lists without any supported locking. Under a
stress test, this eventually leads to list corruption and a crash.
Previously when this routine was called, callers were taking the
device priv lock. Currently this function is called from the RCU
callback associated with neighbour deletion. Fix the race by taking
the same lock we used to before.
Signed-off-by: Shlomo Pongratz <shlomop@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Dave Miller <davem@davemloft.net> provided a detailed description of
why the way IPoIB is using neighbours for its own ipoib_neigh struct
is buggy:
Any time an ipoib_neigh is changed, a sequence like the following is made:
spin_lock_irqsave(&priv->lock, flags);
/*
* It's safe to call ipoib_put_ah() inside
* priv->lock here, because we know that
* path->ah will always hold one more reference,
* so ipoib_put_ah() will never do more than
* decrement the ref count.
*/
if (neigh->ah)
ipoib_put_ah(neigh->ah);
list_del(&neigh->list);
ipoib_neigh_free(dev, neigh);
spin_unlock_irqrestore(&priv->lock, flags);
ipoib_path_lookup(skb, n, dev);
This doesn't work, because you're leaving a stale pointer to the freed up
ipoib_neigh in the special neigh->ha pointer cookie. Yes, it even fails
with all the locking done to protect _changes_ to *ipoib_neigh(n), and
with the code in ipoib_neigh_free() that NULLs out the pointer.
The core issue is that read side calls to *to_ipoib_neigh(n) are not
being synchronized at all, they are performed without any locking. So
whether we hold the lock or not when making changes to *ipoib_neigh(n)
you still can have threads see references to freed up ipoib_neigh
objects.
cpu 1 cpu 2
n = *ipoib_neigh()
*ipoib_neigh() = NULL
kfree(n)
n->foo == OOPS
[..]
Perhaps the ipoib code can have a private path database it manages
entirely itself, which holds all the necessary information and is
looked up by some generic key which is available easily at transmit
time and does not involve generic neighbour entries.
See <http://marc.info/?l=linux-rdma&m=132812793105624&w=2> and
<http://marc.info/?l=linux-rdma&w=2&r=1&s=allows+references+to+freed+memory&q=b>
for the full discussion.
This patch aims to solve the race conditions found in the IPoIB driver.
The patch removes the connection between the core networking neighbour
structure and the ipoib_neigh structure. In addition to avoiding the
race described above, it allows us to handle SKBs carrying IP packets
that don't have any associated neighbour.
We add an ipoib_neigh hash table with N buckets where the key is the
destination hardware address. The ipoib_neigh is fetched from the
hash table and instead of the stashed location in the neighbour
structure. The hash table uses both RCU and reference counting to
guarantee that no ipoib_neigh instance is ever deleted while in use.
Fetching the ipoib_neigh structure instance from the hash also makes
the special code in ipoib_start_xmit that handles remote and local
bonding failover redundant.
Aged ipoib_neigh instances are deleted by a garbage collection task
that runs every M seconds and deletes every ipoib_neigh instance that
was idle for at least 2*M seconds. The deletion is safe since the
ipoib_neigh instances are protected using RCU and reference count
mechanisms.
The number of buckets (N) and frequency of running the GC thread (M),
are taken from the exported arb_tbl.
Signed-off-by: Shlomo Pongratz <shlomop@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
- Updates to the qib low-level driver
- First chunk of changes for SR-IOV support for mlx4 IB
- RDMA CM support for IPv6-only binding
- Other misc cleanups and fixes
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Merge tag 'rdma-for-3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband
Pull InfiniBand/RDMA changes from Roland Dreier:
- Updates to the qib low-level driver
- First chunk of changes for SR-IOV support for mlx4 IB
- RDMA CM support for IPv6-only binding
- Other misc cleanups and fixes
Fix up some add-add conflicts in include/linux/mlx4/device.h and
drivers/net/ethernet/mellanox/mlx4/main.c
* tag 'rdma-for-3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband: (30 commits)
IB/qib: checkpatch fixes
IB/qib: Add congestion control agent implementation
IB/qib: Reduce sdma_lock contention
IB/qib: Fix an incorrect log message
IB/qib: Fix QP RCU sparse warnings
mlx4: Put physical GID and P_Key table sizes in mlx4_phys_caps struct and paravirtualize them
mlx4_core: Allow guests to have IB ports
mlx4_core: Implement mechanism for reserved Q_Keys
net/mlx4_core: Free ICM table in case of error
IB/cm: Destroy idr as part of the module init error flow
mlx4_core: Remove double function declarations
IB/mlx4: Fill the masked_atomic_cap attribute in query device
IB/mthca: Fill in sq_sig_type in query QP
IB/mthca: Warning about event for non-existent QPs should show event type
IB/qib: Fix sparse RCU warnings in qib_keys.c
net/mlx4_core: Initialize IB port capabilities for all slaves
mlx4: Use port management change event instead of smp_snoop
IB/qib: RCU locking for MR validation
IB/qib: Avoid returning EBUSY from MR deregister
IB/qib: Fix UC MR refs for immediate operations
...
Pull networking changes from David S Miller:
1) Remove the ipv4 routing cache. Now lookups go directly into the FIB
trie and use prebuilt routes cached there.
No more garbage collection, no more rDOS attacks on the routing
cache. Instead we now get predictable and consistent performance,
no matter what the pattern of traffic we service.
This has been almost 2 years in the making. Special thanks to
Julian Anastasov, Eric Dumazet, Steffen Klassert, and others who
have helped along the way.
I'm sure that with a change of this magnitude there will be some
kind of fallout, but such things ought the be simple to fix at this
point. Luckily I'm not European so I'll be around all of August to
fix things :-)
The major stages of this work here are each fronted by a forced
merge commit whose commit message contains a top-level description
of the motivations and implementation issues.
2) Pre-demux of established ipv4 TCP sockets, saves a route demux on
input.
3) TCP SYN/ACK performance tweaks from Eric Dumazet.
4) Add namespace support for netfilter L4 conntrack helpers, from Gao
Feng.
5) Add config mechanism for Energy Efficient Ethernet to ethtool, from
Yuval Mintz.
6) Remove quadratic behavior from /proc/net/unix, from Eric Dumazet.
7) Support for connection tracker helpers in userspace, from Pablo
Neira Ayuso.
8) Allow userspace driven TX load balancing functions in TEAM driver,
from Jiri Pirko.
9) Kill off NLMSG_PUT and RTA_PUT macros, more gross stuff with
embedded gotos.
10) TCP Small Queues, essentially minimize the amount of TCP data queued
up in the packet scheduler layer. Whereas the existing BQL (Byte
Queue Limits) limits the pkt_sched --> netdevice queuing levels,
this controls the TCP --> pkt_sched queueing levels.
From Eric Dumazet.
11) Reduce the number of get_page/put_page ops done on SKB fragments,
from Alexander Duyck.
12) Implement protection against blind resets in TCP (RFC 5961), from
Eric Dumazet.
13) Support the client side of TCP Fast Open, basically the ability to
send data in the SYN exchange, from Yuchung Cheng.
Basically, the sender queues up data with a sendmsg() call using
MSG_FASTOPEN, then they do the connect() which emits the queued up
fastopen data.
14) Avoid all the problems we get into in TCP when timers or PMTU events
hit a locked socket. The TCP Small Queues changes added a
tcp_release_cb() that allows us to queue work up to the
release_sock() caller, and that's what we use here too. From Eric
Dumazet.
15) Zero copy on TX support for TUN driver, from Michael S. Tsirkin.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1870 commits)
genetlink: define lockdep_genl_is_held() when CONFIG_LOCKDEP
r8169: revert "add byte queue limit support".
ipv4: Change rt->rt_iif encoding.
net: Make skb->skb_iif always track skb->dev
ipv4: Prepare for change of rt->rt_iif encoding.
ipv4: Remove all RTCF_DIRECTSRC handliing.
ipv4: Really ignore ICMP address requests/replies.
decnet: Don't set RTCF_DIRECTSRC.
net/ipv4/ip_vti.c: Fix __rcu warnings detected by sparse.
ipv4: Remove redundant assignment
rds: set correct msg_namelen
openvswitch: potential NULL deref in sample()
tcp: dont drop MTU reduction indications
bnx2x: Add new 57840 device IDs
tcp: avoid oops in tcp_metrics and reset tcpm_stamp
niu: Change niu_rbr_fill() to use unlikely() to check niu_rbr_add_page() return value
niu: Fix to check for dma mapping errors.
net: Fix references to out-of-scope variables in put_cmsg_compat()
net: ethernet: davinci_emac: add pm_runtime support
net: ethernet: davinci_emac: Remove unnecessary #include
...
Pull target updates from Nicholas Bellinger:
"There have been lots of work in a number of areas this past round.
The highlights include:
- Break out target_core_cdb.c emulation into SPC/SBC ops (hch)
- Add a parse_cdb method to target backend drivers (hch)
- Move sync_cache + write_same + unmap into spc_ops (hch)
- Use target_execute_cmd for WRITEs in iscsi_target + srpt (hch)
- Offload WRITE I/O backend submission in tcm_qla2xxx + tcm_fc (hch +
nab)
- Refactor core_update_device_list_for_node() into enable/disable
funcs (agrover)
- Replace the TCM processing thread with a TMR work queue (hch)
- Fix regression in transport_add_device_to_core_hba from TMR
conversion (DanC)
- Remove racy, now-redundant check of sess_tearing_down with qla2xxx
(roland)
- Add range checking, fix reading of data len + possible underflow in
UNMAP (roland)
- Allow for target_submit_cmd() returning errors + convert fabrics
(roland + nab)
- Drop bogus struct file usage for iSCSI/SCTP (viro)"
* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (54 commits)
iscsi-target: Drop bogus struct file usage for iSCSI/SCTP
target: NULL dereference on error path
target: Allow for target_submit_cmd() returning errors
target: Check number of unmap descriptors against our limit
target: Fix possible integer underflow in UNMAP emulation
target: Fix reading of data length fields for UNMAP commands
target: Add range checking to UNMAP emulation
target: Add generation of LOGICAL BLOCK ADDRESS OUT OF RANGE
target: Make unnecessarily global se_dev_align_max_sectors() static
target: Remove se_session.sess_wait_list
qla2xxx: Remove racy, now-redundant check of sess_tearing_down
target: Check sess_tearing_down in target_get_sess_cmd()
sbp-target: Consolidate duplicated error path code in sbp_handle_command()
target: Un-export target_get_sess_cmd()
qla2xxx: Get rid of redundant qla_tgt_sess.tearing_down
target: Make core_disable_device_list_for_node use pre-refactoring lock ordering
target: refactor core_update_device_list_for_node()
target: Eliminate else using boolean logic
target: Misc retval cleanups
target: Remove hba param from core_dev_add_lun
...
This will be used so that we can compose a full flow key.
Even though we have a route in this context, we need more. In the
future the routes will be without destination address, source address,
etc. keying. One ipv4 route will cover entire subnets, etc.
In this environment we have to have a way to possess persistent storage
for redirects and PMTU information. This persistent storage will exist
in the FIB tables, and that's why we'll need to be able to rebuild a
full lookup flow key here. Using that flow key will do a fib_lookup()
and create/update the persistent entry.
Signed-off-by: David S. Miller <davem@davemloft.net>
srpt_handle_rdma_comp is called from kthread context and thus can execute
target_execute_cmd directly. srpt_abort_cmd sets the CMD_T_LUN_STOP
flag directly, and thus the abuse of transport_generic_handle_data can be
replaced with an opencoded variant of that code path. I'm still not happy
about a fabric driver poking into target core internals like this, but
let's defer the bigger architecture changes for now.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Conflicts:
net/batman-adv/bridge_loop_avoidance.c
net/batman-adv/bridge_loop_avoidance.h
net/batman-adv/soft-interface.c
net/mac80211/mlme.c
With merge help from Antonio Quartulli (batman-adv) and
Stephen Rothwell (drivers/net/usb/qmi_wwan.c).
The net/mac80211/mlme.c conflict seemed easy enough, accounting for a
conversion to some new tracing macros.
Signed-off-by: David S. Miller <davem@davemloft.net>
Or Gerlitz reported triggering of WARN_ON_ONCE(delta < len); in
skb_try_coalesce()
This warning tracks drivers that incorrectly set skb->truesize
IPoIB indeed allocates a full page to store a fragment, but only
accounts in skb->truesize the used part of the page (frame length)
This patch fixes skb truesize underestimation, and
also fixes a performance issue, because RX skbs have not enough tailroom
to allow IP and TCP stacks to pull their header in skb linear part
without an expensive call to pskb_expand_head()
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Or Gerlitz <ogerlitz@mellanox.com>
Cc: Erez Shitrit <erezsh@mellanox.com>
Cc: Shlomo Pongartz <shlomop@mellanox.com>
Cc: Roland Dreier <roland@purestorage.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
- Add ocrdma hardware driver for Emulex IB-over-Ethernet adapters
- Add generic and mlx4 support for "raw" QPs: allow suitably privileged
applications to send and receive arbitrary packets directly to/from
the hardware
- Add "doorbell drop" handling to the cxgb4 driver
- A fairly large batch of qib hardware driver changes
- A few fixes for lockdep-detected issues
- A few other miscellaneous fixes and cleanups
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Merge tag 'rdma-for-3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband
Pull InfiniBand/RDMA changes from Roland Dreier:
- Add ocrdma hardware driver for Emulex IB-over-Ethernet adapters
- Add generic and mlx4 support for "raw" QPs: allow suitably privileged
applications to send and receive arbitrary packets directly to/from
the hardware
- Add "doorbell drop" handling to the cxgb4 driver
- A fairly large batch of qib hardware driver changes
- A few fixes for lockdep-detected issues
- A few other miscellaneous fixes and cleanups
Fix up trivial conflict in drivers/net/ethernet/emulex/benet/be.h.
* tag 'rdma-for-3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband: (53 commits)
RDMA/cxgb4: Include vmalloc.h for vmalloc and vfree
IB/mlx4: Fix mlx4_ib_add() error flow
IB/core: Fix IB_SA_COMP_MASK macro
IB/iser: Fix error flow in iser ep connection establishment
IB/mlx4: Increase the number of vectors (EQs) available for ULPs
RDMA/cxgb4: Add query_qp support
RDMA/cxgb4: Remove kfifo usage
RDMA/cxgb4: Use vmalloc() for debugfs QP dump
RDMA/cxgb4: DB Drop Recovery for RDMA and LLD queues
RDMA/cxgb4: Disable interrupts in c4iw_ev_dispatch()
RDMA/cxgb4: Add DB Overflow Avoidance
RDMA/cxgb4: Add debugfs RDMA memory stats
cxgb4: DB Drop Recovery for RDMA and LLD queues
cxgb4: Common platform specific changes for DB Drop Recovery
cxgb4: Detect DB FULL events and notify RDMA ULD
RDMA/cxgb4: Drop peer_abort when no endpoint found
RDMA/cxgb4: Always wake up waiters in c4iw_peer_abort_intr()
mlx4_core: Change bitmap allocator to work in round-robin fashion
RDMA/nes: Don't call event handler if pointer is NULL
RDMA/nes: Fix for the ORD value of the connecting peer
...
Pull scsi-target changes from Nicholas Bellinger:
"There has been lots of work in existing code in a number of areas this
past cycle. The major highlights have been:
* Removal of transport_do_task_sg_chain() from core + fabrics
(Roland)
* target-core: Removal of se_task abstraction from target-core and
enforce hw_max_sectors for pSCSI backends (hch)
* Re-factoring of iscsi-target tx immediate/response queues (agrover)
* Conversion of iscsi-target back to using target core memory
allocation logic (agrover)
We've had one last minute iscsi-target patch go into for-next to
address a nasty regression bug related to the target core allocation
logic conversion from agrover that is not included in friday's
linux-next build, but has been included in this series.
On the new fabric module code front for-3.5, here is a brief status
update for the three currently in flight this round:
* usb-gadget target driver:
Sebastian Siewior's driver for supporting usb-gadget target mode
operation. This will be going out as a separate PULL request from
target-pending/usb-target-merge with subsystem maintainer ACKs. There
is one minor target-core patch in this series required to function.
* sbp ieee-1394/firewire target driver:
Chris Boot's driver for supportting the Serial Block Protocol (SBP)
across IEEE-1394 Firewire hardware. This will be going out as a
separate PULL request from target-pending/sbp-target-merge with two
additional drivers/firewire/ patches w/ subsystem maintainer ACKs.
* qla2xxx LLD target mode infrastructure changes + tcm_qla2xxx:
The Qlogic >= 24xx series HW target mode LLD infrastructure patch-set
and tcm_qla2xxx fabric driver. Support for FC target mode using
qla2xxx LLD code has been officially submitted by Qlogic to James
below, and is currently outstanding but not yet merged into
scsi.git/for-next..
[PATCH 00/22] qla2xxx: Updates for scsi "misc" branch
http://www.spinics.net/lists/linux-scsi/msg59350.html
Note there are *zero* direct dependencies upon this for-next series
for the qla2xxx LLD target + tcm_qla2xxx patches submitted above, and
over the last days the target mode team has been tracking down an
tcm_qla2xxx specific active I/O shutdown bug that appears to now be
almost squashed for 3.5-rc-fixes."
* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (47 commits)
iscsi-target: Fix iov_count calculation bug in iscsit_allocate_iovecs
iscsi-target: remove dead code in iscsi_check_valuelist_for_support
target: Handle ATA_16 passthrough for pSCSI backend devices
target: Add MI_REPORT_TARGET_PGS ext. header + implict_trans_secs attribute
target: Fix MAINTENANCE_IN service action CDB checks to use lower 5 bits
target: add support for the WRITE_VERIFY command
target: make target_put_session void
target: cleanup transport_execute_tasks()
target: Remove max_sectors device attribute for modern se_task less code
target: lock => unlock typo in transport_lun_wait_for_tasks
target: Enforce hw_max_sectors for SCF_SCSI_DATA_SG_IO_CDB
target: remove the t_se_count field in struct se_cmd
target: remove the t_task_cdbs_ex_left field in struct se_cmd
target: remove the t_task_cdbs_left field in struct se_cmd
target: remove struct se_task
target: move the state and execute lists to the command
target: simplify command to task linkage
target: always allocate a single task
target: replace ->execute_task with ->execute_cmd
target: remove the task_sectors field in struct se_task
...
The current error flow code was releasing the IB connection object and
calling iscsi_destroy_endpoint() directly without going through the
reference counting mechanism introduced in commit 39ff05d ("IB/iser:
Enhance disconnection logic for multi-pathing"). This resulted in a
double free of the iscsi endpoint object, which causes a kernel NULL
pointer dereference. Fix that by plugging into the IB conn reference
counting correctly.
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This patch renames a horribly misnamed function that no longer allocate
tasks to something more descriptive for it's modern use in target core.
(nab: Fix up ib_srpt to use this as well ahead of a target_submit_cmd
conversion)
Signed-off-by: Andy Grover <agrover@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
With the modern target core, se_cmd->t_data_sg already points to a
sglist that covers the whole command. So task_sg chaining is needless
overhead and obfuscation -- instead of splicing the split up task
sglists back into one list, we can just use the original list directly.
Signed-off-by: Roland Dreier <roland@purestorage.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Since commit 96104eda01 ("RDMA/core: Add SRQ type field"), kernel
users of SRQs need to specify srq_type = IB_SRQT_BASIC in struct
ib_srq_init_attr, or else most low-level drivers will fail in
when srpt_add_one() calls ib_create_srq() and gets -ENOSYS.
(mlx4_ib works OK nearly all of the time, because it just needs
srq_type != IB_SRQT_XRC. And apparently nearly everyone using
ib_srpt is using mlx4 hardware)
Reported-by: Alexey Shvetsov <alexxy@gentoo.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Pull SCSI target updates from Nicholas Bellinger:
"This contains the usual set of updates and bugfixes to target-core +
existing fabric module code, along with a handful of the patches
destined for v3.3 stable.
It also contains the necessary target-core infrastructure pieces
required to run using tcm_qla2xxx.ko WWPNs with the new Qlogic Fibre
Channel fabric module currently queued in target-pending/for-next-merge,
and coming for round 2.
The highlights for this series include:
- Add target_submit_tmr() helper function for fabric task management
(andy)
- Convert tcm_fc to use target_submit_tmr() (andy)
- Replace target core various cmd flags with a transport state (hch)
- Convert loopback to use workqueue submission (hch)
- Convert target core to use array_zalloc for tpg_lun_list (joern)
- Convert target core to use array_zalloc for device_list (joern)
- Add target core support for TMR_ABORT_TASK (nab)
- Add target core se_sess->sess_kref + get/put helpers (nab)
- Add target core se_node_acl->acl_kref for ->acl_free_comp usage
(nab)
- Convert iscsi-target to use target_put_session + sess_kref (nab)
- Fix tcm_fc fc_exch memory leak in ft_send_resp_status (nab)
- Fix ib_srpt srpt_handle_cmd send_ioctx->ioctx_kref leak on
exception (nab)
- Fix target core up handling of short INQUIRY buffers (roland)
- Untangle target-core front-end and back-end meanings of max_sectors
attribute (roland)
- Set loopback residual field for SCSI commands (roland)
- Fix target-core 16-bit target ports for SET TARGET PORT GROUPS
emulation (roland)
Thanks again to Andy, Christoph, Joern, Roland, and everyone who has
contributed this round!"
* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (64 commits)
ib_srpt: Fix srpt_handle_cmd send_ioctx->ioctx_kref leak on exception
loopback: Fix transport_generic_allocate_tasks error handling
iscsi-target: remove improper externs
iscsi-target: Remove unused variables in iscsi_target_parameters.c
target: remove obvious warnings
target: Use array_zalloc for device_list
target: Use array_zalloc for tpg_lun_list
target: Fix sense code for unsupported SERVICE ACTION IN
target: Remove hack to make READ CAPACITY(10) lie if thin provisioning is enabled
target: Bump core version to v4.1.0-rc2-ml + fabric versions
tcm_fc: Fix fc_exch memory leak in ft_send_resp_status
target: Drop unused legacy target_core_fabric_ops API callers
iscsi-target: Convert to use target_put_session + sess_kref
target: Convert se_node_acl->acl_group removal to use ->acl_kref
target: Add se_node_acl->acl_kref for ->acl_free_comp usage
target: Add se_node_acl->acl_free_comp for NodeACL release path
target: Add se_sess->sess_kref + get/put helpers
target: Convert session_lock to irqsave
target: Fix typo in drivers/target
iscsi-target: Fix dynamic -> explict NodeACL pointer reference
...
stands out; by patch count lots of fixes to the mlx4 driver plus some
cleanups and fixes to the core and other drivers.
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Merge tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband
Pull InfiniBand/RDMA changes for the 3.4 merge window from Roland Dreier:
"Nothing big really stands out; by patch count lots of fixes to the
mlx4 driver plus some cleanups and fixes to the core and other
drivers."
* tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband: (28 commits)
mlx4_core: Scale size of MTT table with system RAM
mlx4_core: Allow dynamic MTU configuration for IB ports
IB/mlx4: Fix info returned when querying IBoE ports
IB/mlx4: Fix possible missed completion event
mlx4_core: Report thermal error events
mlx4_core: Fix one more static exported function
IB: Change CQE "csum_ok" field to a bit flag
RDMA/iwcm: Reject connect requests if cmid is not in LISTEN state
RDMA/cxgb3: Don't pass irq flags to flush_qp()
mlx4_core: Get rid of redundant ext_port_cap flags
RDMA/ucma: Fix AB-BA deadlock
IB/ehca: Fix ilog2() compile failure
IB: Use central enum for speed instead of hard-coded values
IB/iser: Post initial receive buffers before sending the final login request
IB/iser: Free IB connection resources in the proper place
IB/srp: Consolidate repetitive sysfs code
IB/srp: Use pr_fmt() and pr_err()/pr_warn()
IB/core: Fix SDR rates in sysfs
mlx4: Enforce device max FMR maps in FMR alloc
IB/mlx4: Set bad_wr for invalid send opcode
...
Pull kmap_atomic cleanup from Cong Wang.
It's been in -next for a long time, and it gets rid of the (no longer
used) second argument to k[un]map_atomic().
Fix up a few trivial conflicts in various drivers, and do an "evil
merge" to catch some new uses that have come in since Cong's tree.
* 'kmap_atomic' of git://github.com/congwang/linux: (59 commits)
feature-removal-schedule.txt: schedule the deprecated form of kmap_atomic() for removal
highmem: kill all __kmap_atomic() [swarren@nvidia.com: highmem: Fix ARM build break due to __kmap_atomic rename]
drbd: remove the second argument of k[un]map_atomic()
zcache: remove the second argument of k[un]map_atomic()
gma500: remove the second argument of k[un]map_atomic()
dm: remove the second argument of k[un]map_atomic()
tomoyo: remove the second argument of k[un]map_atomic()
sunrpc: remove the second argument of k[un]map_atomic()
rds: remove the second argument of k[un]map_atomic()
net: remove the second argument of k[un]map_atomic()
mm: remove the second argument of k[un]map_atomic()
lib: remove the second argument of k[un]map_atomic()
power: remove the second argument of k[un]map_atomic()
kdb: remove the second argument of k[un]map_atomic()
udf: remove the second argument of k[un]map_atomic()
ubifs: remove the second argument of k[un]map_atomic()
squashfs: remove the second argument of k[un]map_atomic()
reiserfs: remove the second argument of k[un]map_atomic()
ocfs2: remove the second argument of k[un]map_atomic()
ntfs: remove the second argument of k[un]map_atomic()
...
Pull trivial tree from Jiri Kosina:
"It's indeed trivial -- mostly documentation updates and a bunch of
typo fixes from Masanari.
There are also several linux/version.h include removals from Jesper."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (101 commits)
kcore: fix spelling in read_kcore() comment
constify struct pci_dev * in obvious cases
Revert "char: Fix typo in viotape.c"
init: fix wording error in mm_init comment
usb: gadget: Kconfig: fix typo for 'different'
Revert "power, max8998: Include linux/module.h just once in drivers/power/max8998_charger.c"
writeback: fix fn name in writeback_inodes_sb_nr_if_idle() comment header
writeback: fix typo in the writeback_control comment
Documentation: Fix multiple typo in Documentation
tpm_tis: fix tis_lock with respect to RCU
Revert "media: Fix typo in mixer_drv.c and hdmi_drv.c"
Doc: Update numastat.txt
qla4xxx: Add missing spaces to error messages
compiler.h: Fix typo
security: struct security_operations kerneldoc fix
Documentation: broken URL in libata.tmpl
Documentation: broken URL in filesystems.tmpl
mtd: simplify return logic in do_map_probe()
mm: fix comment typo of truncate_inode_pages_range
power: bq27x00: Fix typos in comment
...
This patch addresses a bug in srpt_handle_cmd() failure handling where
send_ioctx->kref is being leaked with the local extra reference after init,
causing the expected kref_put() in srpt_handle_send_comp() to not be the final
call to invoke srpt_put_send_ioctx_kref() -> transport_generic_free_cmd() and
perform se_cmd descriptor memory release.
It also fixes a SCF_SCSI_RESERVATION_CONFLICT handling bug where this code
is incorrectly falling through to transport_handle_cdb_direct() after
invoking srpt_queue_status() to send SAM_STAT_RESERVATION_CONFLICT status.
Note this patch is for >= v3.3 mainline code, and current lio-core.git
code has already been converted to target_submit_cmd() + se_cmd->cmd_kref usage,
and internal ioctx->kref usage has been removed. I'm including this patch
now into target-pending/for-next with a CC' for v3.3 stable.
Cc: Bart Van Assche <bvanassche@acm.org>
Cc: Roland Dreier <roland@purestorage.com>
Cc: stable@vger.kernel.org
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This patch drops the following unused legacy API callers from target_core_fabric.h:
*) TFO->fall_back_to_erl0()
*) TFO->stop_session()
*) TFO->sess_logged_in()
*) TFO->is_state_remove()
This patch also removes the stub usage in loopback, tcm_fc, iscsi_target,
and ib_srpt fabric modules.
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Use a bit in wc_flags rather then a whole integer to hold the
"checksum OK" flag. By itself, this change doesn't reduce the size of
struct ib_wc on 64bit machines -- it stays on 56 bytes because of
padding. However, it will allow to add more fields in the future
without enlarging the struct. Also, it will let us have a unified
approach with future libibverbs checksum offload reporting, because a
bit flag doesn't break the library ABI.
This patch was suggested during conversation with Liran Liss
<liranl@mellanox.com>.
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
An iser target may send iscsi NO-OP PDUs as soon as it marks the iSER
iSCSI session as fully operative. This means that there is window
where there are no posted receive buffers on the initiator side, so
it's possible for the iSER RC connection to break because of RNR NAK /
retry errors. To fix this, rely on the flags bits in the login
request to have FFP (0x3) in the lower nibble as a marker for the
final login request, and post an initial chunk of receive buffers
before sending that login request instead of after getting the login
response.
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Roland Dreier <roland@purestorage.com>
We allocate the login dma buffers in iser_verbs.c as part of
alloc_ib_conn_resources(), however we are freeing them in
iser_initiator.c as part of iser_free_rx_descriptors(). This is
needlessly confusing. We have an alloc_rx_descriptors() and it
doesn't alloc something that the free_rx_descriptors() frees, and we
have an alloc_ib_conn_resources() that allocs something not freed by
free_ib_conn_resources(). Clean that up.
Signed-off-by: Doug Ledford <dledford@redhat.com>
[ Fix build error in iser_free_ib_conn_res(). - Or ]
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Remove sysfs attributes before removing a target instead of testing
the target state in every sysfs attribute callback method. Note: it is
safe to invoke a sysfs attribute removal method like
device_remove_file() twice on the same attribute.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: David Dillow <dillowda@ornl.gov>
Signed-off-by: Roland Dreier <roland@purestorage.com>
