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Main batch of InfiniBand/RDMA changes for 3.14:

Browse source 
- Flow steering for InfiniBand UD traffic
  - IP-based addressing for IBoE aka RoCE
  - Pass SRP submaintainership from Dave to Bart
  - SRP transport fixes from Bart
  - Add the new Cisco usNIC low-level device driver
  - Various other 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:
 "Main batch of InfiniBand/RDMA changes for 3.14:
   - Flow steering for InfiniBand UD traffic
   - IP-based addressing for IBoE aka RoCE
   - Pass SRP submaintainership from Dave to Bart
   - SRP transport fixes from Bart
   - Add the new Cisco usNIC low-level device driver
   - Various other fixes"

* tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband: (75 commits)
  IB/mlx5: Verify reserved fields are cleared
  IB/mlx5: Remove old field for create mkey mailbox
  IB/mlx5: Abort driver cleanup if teardown hca fails
  IB/mlx5: Allow creation of QPs with zero-length work queues
  mlx5_core: Fix PowerPC support
  mlx5_core: Improve debugfs readability
  IB/mlx5: Add support for resize CQ
  IB/mlx5: Implement modify CQ
  IB/mlx5: Make sure doorbell record is visible before doorbell
  mlx5_core: Use mlx5 core style warning
  IB/mlx5: Clear out struct before create QP command
  mlx5_core: Fix out arg size in access_register command
  RDMA/nes: Slight optimization of Ethernet address compare
  IB/qib: Fix QP check when looping back to/from QP1
  RDMA/cxgb4: Fix gcc warning on 32-bit arch
  IB/usnic: Remove unused includes of <linux/version.h>
  RDMA/amso1100: Add check if cache memory was allocated before freeing it
  IPoIB: Report operstate consistently when brought up without a link
  IB/core: Fix unused variable warning
  RDMA/cma: Handle global/non-linklocal IPv6 addresses in cma_check_linklocal()
  ...
This commit is contained in:
Linus Torvalds 2014-01-24 17:18:32 -08:00
commit 8e585a6c4a
100 changed files with 7663 additions and 567 deletions
Download patch file Download diff file Expand all files Collapse all files

95
drivers/scsi/scsi_transport_srp.c
View file

@ -64,10 +64,14 @@ static inline struct Scsi_Host *rport_to_shost(struct srp_rport *r)
/**
* srp_tmo_valid() - check timeout combination validity
* @reconnect_delay: Reconnect delay in seconds.
* @fast_io_fail_tmo: Fast I/O fail timeout in seconds.
* @dev_loss_tmo: Device loss timeout in seconds.
*
* The combination of the timeout parameters must be such that SCSI commands
* are finished in a reasonable time. Hence do not allow the fast I/O fail
* timeout to exceed SCSI_DEVICE_BLOCK_MAX_TIMEOUT. Furthermore, these
* timeout to exceed SCSI_DEVICE_BLOCK_MAX_TIMEOUT nor allow dev_loss_tmo to
* exceed that limit if failing I/O fast has been disabled. Furthermore, these
* parameters must be such that multipath can detect failed paths timely.
* Hence do not allow all three parameters to be disabled simultaneously.
*/
@ -79,6 +83,9 @@ int srp_tmo_valid(int reconnect_delay, int fast_io_fail_tmo, int dev_loss_tmo)
return -EINVAL;
if (fast_io_fail_tmo > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)
return -EINVAL;
if (fast_io_fail_tmo < 0 &&
dev_loss_tmo > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)
return -EINVAL;
if (dev_loss_tmo >= LONG_MAX / HZ)
return -EINVAL;
if (fast_io_fail_tmo >= 0 && dev_loss_tmo >= 0 &&
@ -368,6 +375,7 @@ invalid:
/**
* srp_reconnect_work() - reconnect and schedule a new attempt if necessary
* @work: Work structure used for scheduling this operation.
*/
static void srp_reconnect_work(struct work_struct *work)
{
@ -408,6 +416,7 @@ static void __rport_fail_io_fast(struct srp_rport *rport)
/**
* rport_fast_io_fail_timedout() - fast I/O failure timeout handler
* @work: Work structure used for scheduling this operation.
*/
static void rport_fast_io_fail_timedout(struct work_struct *work)
{
@ -426,6 +435,7 @@ static void rport_fast_io_fail_timedout(struct work_struct *work)
/**
* rport_dev_loss_timedout() - device loss timeout handler
* @work: Work structure used for scheduling this operation.
*/
static void rport_dev_loss_timedout(struct work_struct *work)
{
@ -452,42 +462,35 @@ static void __srp_start_tl_fail_timers(struct srp_rport *rport)
lockdep_assert_held(&rport->mutex);
if (!rport->deleted) {
delay = rport->reconnect_delay;
fast_io_fail_tmo = rport->fast_io_fail_tmo;
dev_loss_tmo = rport->dev_loss_tmo;
pr_debug("%s current state: %d\n",
dev_name(&shost->shost_gendev), rport->state);
delay = rport->reconnect_delay;
fast_io_fail_tmo = rport->fast_io_fail_tmo;
dev_loss_tmo = rport->dev_loss_tmo;
pr_debug("%s current state: %d\n", dev_name(&shost->shost_gendev),
rport->state);
if (delay > 0)
queue_delayed_work(system_long_wq,
&rport->reconnect_work,
1UL * delay * HZ);
if (fast_io_fail_tmo >= 0 &&
srp_rport_set_state(rport, SRP_RPORT_BLOCKED) == 0) {
pr_debug("%s new state: %d\n",
dev_name(&shost->shost_gendev),
rport->state);
scsi_target_block(&shost->shost_gendev);
if (rport->state == SRP_RPORT_LOST)
return;
if (delay > 0)
queue_delayed_work(system_long_wq, &rport->reconnect_work,
1UL * delay * HZ);
if (srp_rport_set_state(rport, SRP_RPORT_BLOCKED) == 0) {
pr_debug("%s new state: %d\n", dev_name(&shost->shost_gendev),
rport->state);
scsi_target_block(&shost->shost_gendev);
if (fast_io_fail_tmo >= 0)
queue_delayed_work(system_long_wq,
&rport->fast_io_fail_work,
1UL * fast_io_fail_tmo * HZ);
}
if (dev_loss_tmo >= 0)
queue_delayed_work(system_long_wq,
&rport->dev_loss_work,
1UL * dev_loss_tmo * HZ);
} else {
pr_debug("%s has already been deleted\n",
dev_name(&shost->shost_gendev));
srp_rport_set_state(rport, SRP_RPORT_FAIL_FAST);
scsi_target_unblock(&shost->shost_gendev,
SDEV_TRANSPORT_OFFLINE);
}
}
/**
* srp_start_tl_fail_timers() - start the transport layer failure timers
* @rport: SRP target port.
*
* Start the transport layer fast I/O failure and device loss timers. Do not
* modify a timer that was already started.
@ -502,6 +505,7 @@ EXPORT_SYMBOL(srp_start_tl_fail_timers);
/**
* scsi_request_fn_active() - number of kernel threads inside scsi_request_fn()
* @shost: SCSI host for which to count the number of scsi_request_fn() callers.
*/
static int scsi_request_fn_active(struct Scsi_Host *shost)
{
@ -522,6 +526,7 @@ static int scsi_request_fn_active(struct Scsi_Host *shost)
/**
* srp_reconnect_rport() - reconnect to an SRP target port
* @rport: SRP target port.
*
* Blocks SCSI command queueing before invoking reconnect() such that
* queuecommand() won't be invoked concurrently with reconnect() from outside
@ -556,7 +561,7 @@ int srp_reconnect_rport(struct srp_rport *rport)
scsi_target_block(&shost->shost_gendev);
while (scsi_request_fn_active(shost))
msleep(20);
res = i->f->reconnect(rport);
res = rport->state != SRP_RPORT_LOST ? i->f->reconnect(rport) : -ENODEV;
pr_debug("%s (state %d): transport.reconnect() returned %d\n",
dev_name(&shost->shost_gendev), rport->state, res);
if (res == 0) {
@ -578,9 +583,9 @@ int srp_reconnect_rport(struct srp_rport *rport)
spin_unlock_irq(shost->host_lock);
} else if (rport->state == SRP_RPORT_RUNNING) {
/*
* srp_reconnect_rport() was invoked with fast_io_fail
* off. Mark the port as failed and start the TL failure
* timers if these had not yet been started.
* srp_reconnect_rport() has been invoked with fast_io_fail
* and dev_loss off. Mark the port as failed and start the TL
* failure timers if these had not yet been started.
*/
__rport_fail_io_fast(rport);
scsi_target_unblock(&shost->shost_gendev,
@ -599,6 +604,7 @@ EXPORT_SYMBOL(srp_reconnect_rport);
/**
* srp_timed_out() - SRP transport intercept of the SCSI timeout EH
* @scmd: SCSI command.
*
* If a timeout occurs while an rport is in the blocked state, ask the SCSI
* EH to continue waiting (BLK_EH_RESET_TIMER). Otherwise let the SCSI core
@ -622,10 +628,6 @@ static void srp_rport_release(struct device *dev)
{
struct srp_rport *rport = dev_to_rport(dev);
cancel_delayed_work_sync(&rport->reconnect_work);
cancel_delayed_work_sync(&rport->fast_io_fail_work);
cancel_delayed_work_sync(&rport->dev_loss_work);
put_device(dev->parent);
kfree(rport);
}
@ -674,6 +676,7 @@ static int srp_host_match(struct attribute_container *cont, struct device *dev)
/**
* srp_rport_get() - increment rport reference count
* @rport: SRP target port.
*/
void srp_rport_get(struct srp_rport *rport)
{
@ -683,6 +686,7 @@ EXPORT_SYMBOL(srp_rport_get);
/**
* srp_rport_put() - decrement rport reference count
* @rport: SRP target port.
*/
void srp_rport_put(struct srp_rport *rport)
{
@ -780,12 +784,6 @@ void srp_rport_del(struct srp_rport *rport)
device_del(dev);
transport_destroy_device(dev);
mutex_lock(&rport->mutex);
if (rport->state == SRP_RPORT_BLOCKED)
__rport_fail_io_fast(rport);
rport->deleted = true;
mutex_unlock(&rport->mutex);
put_device(dev);
}
EXPORT_SYMBOL_GPL(srp_rport_del);
@ -810,6 +808,27 @@ void srp_remove_host(struct Scsi_Host *shost)
}
EXPORT_SYMBOL_GPL(srp_remove_host);
/**
* srp_stop_rport_timers - stop the transport layer recovery timers
*
* Must be called after srp_remove_host() and scsi_remove_host(). The caller
* must hold a reference on the rport (rport->dev) and on the SCSI host
* (rport->dev.parent).
*/
void srp_stop_rport_timers(struct srp_rport *rport)
{
mutex_lock(&rport->mutex);
if (rport->state == SRP_RPORT_BLOCKED)
__rport_fail_io_fast(rport);
srp_rport_set_state(rport, SRP_RPORT_LOST);
mutex_unlock(&rport->mutex);
cancel_delayed_work_sync(&rport->reconnect_work);
cancel_delayed_work_sync(&rport->fast_io_fail_work);
cancel_delayed_work_sync(&rport->dev_loss_work);
}
EXPORT_SYMBOL_GPL(srp_stop_rport_timers);
static int srp_tsk_mgmt_response(struct Scsi_Host *shost, u64 nexus, u64 tm_id,
int result)
{