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Main batch of InfiniBand/RDMA changes for 3.13:

Browse source 
- Re-enable flow steering verbs with new improved userspace ABI
  - Fixes for slow connection due to GID lookup scalability
  - IPoIB fixes
  - Many fixes to HW drivers including mlx4, mlx5, ocrdma and qib
  - Further improvements to SRP error handling
  - Add new transport type for Cisco usNIC
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Merge tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband

Pull infiniband/rdma updates from Roland Dreier:
 - Re-enable flow steering verbs with new improved userspace ABI
 - Fixes for slow connection due to GID lookup scalability
 - IPoIB fixes
 - Many fixes to HW drivers including mlx4, mlx5, ocrdma and qib
 - Further improvements to SRP error handling
 - Add new transport type for Cisco usNIC

* tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband: (66 commits)
  IB/core: Re-enable create_flow/destroy_flow uverbs
  IB/core: extended command: an improved infrastructure for uverbs commands
  IB/core: Remove ib_uverbs_flow_spec structure from userspace
  IB/core: Use a common header for uverbs flow_specs
  IB/core: Make uverbs flow structure use names like verbs ones
  IB/core: Rename 'flow' structs to match other uverbs structs
  IB/core: clarify overflow/underflow checks on ib_create/destroy_flow
  IB/ucma: Convert use of typedef ctl_table to struct ctl_table
  IB/cm: Convert to using idr_alloc_cyclic()
  IB/mlx5: Fix page shift in create CQ for userspace
  IB/mlx4: Fix device max capabilities check
  IB/mlx5: Fix list_del of empty list
  IB/mlx5: Remove dead code
  IB/core: Encorce MR access rights rules on kernel consumers
  IB/mlx4: Fix endless loop in resize CQ
  RDMA/cma: Remove unused argument and minor dead code
  RDMA/ucma: Discard events for IDs not yet claimed by user space
  IB/core: Add Cisco usNIC rdma node and transport types
  RDMA/nes: Remove self-assignment from nes_query_qp()
  IB/srp: Report receive errors correctly
  ...
This commit is contained in:
Linus Torvalds 2013-11-18 15:36:04 -08:00
commit 1ea406c0e0
52 changed files with 1973 additions and 595 deletions
Download patch file Download diff file Expand all files Collapse all files

83
include/scsi/scsi_transport_srp.h
View file

@ -13,6 +13,27 @@ struct srp_rport_identifiers {
u8 roles;
};
/**
* enum srp_rport_state - SRP transport layer state
* @SRP_RPORT_RUNNING: Transport layer operational.
* @SRP_RPORT_BLOCKED: Transport layer not operational; fast I/O fail timer
* is running and I/O has been blocked.
* @SRP_RPORT_FAIL_FAST: Fast I/O fail timer has expired; fail I/O fast.
* @SRP_RPORT_LOST: Device loss timer has expired; port is being removed.
*/
enum srp_rport_state {
SRP_RPORT_RUNNING,
SRP_RPORT_BLOCKED,
SRP_RPORT_FAIL_FAST,
SRP_RPORT_LOST,
};
/**
* struct srp_rport
* @lld_data: LLD private data.
* @mutex: Protects against concurrent rport reconnect / fast_io_fail /
* dev_loss_tmo activity.
*/
struct srp_rport {
/* for initiator and target drivers */
@ -23,11 +44,43 @@ struct srp_rport {
/* for initiator drivers */
void *lld_data; /* LLD private data */
void *lld_data;
struct mutex mutex;
enum srp_rport_state state;
bool deleted;
int reconnect_delay;
int failed_reconnects;
struct delayed_work reconnect_work;
int fast_io_fail_tmo;
int dev_loss_tmo;
struct delayed_work fast_io_fail_work;
struct delayed_work dev_loss_work;
};
/**
* struct srp_function_template
* @has_rport_state: Whether or not to create the state, fast_io_fail_tmo and
* dev_loss_tmo sysfs attribute for an rport.
* @reset_timer_if_blocked: Whether or srp_timed_out() should reset the command
* timer if the device on which it has been queued is blocked.
* @reconnect_delay: If not NULL, points to the default reconnect_delay value.
* @fast_io_fail_tmo: If not NULL, points to the default fast_io_fail_tmo value.
* @dev_loss_tmo: If not NULL, points to the default dev_loss_tmo value.
* @reconnect: Callback function for reconnecting to the target. See also
* srp_reconnect_rport().
* @terminate_rport_io: Callback function for terminating all outstanding I/O
* requests for an rport.
*/
struct srp_function_template {
/* for initiator drivers */
bool has_rport_state;
bool reset_timer_if_blocked;
int *reconnect_delay;
int *fast_io_fail_tmo;
int *dev_loss_tmo;
int (*reconnect)(struct srp_rport *rport);
void (*terminate_rport_io)(struct srp_rport *rport);
void (*rport_delete)(struct srp_rport *rport);
/* for target drivers */
int (* tsk_mgmt_response)(struct Scsi_Host *, u64, u64, int);
@ -38,10 +91,36 @@ extern struct scsi_transport_template *
srp_attach_transport(struct srp_function_template *);
extern void srp_release_transport(struct scsi_transport_template *);
extern void srp_rport_get(struct srp_rport *rport);
extern void srp_rport_put(struct srp_rport *rport);
extern struct srp_rport *srp_rport_add(struct Scsi_Host *,
struct srp_rport_identifiers *);
extern void srp_rport_del(struct srp_rport *);
extern int srp_tmo_valid(int reconnect_delay, int fast_io_fail_tmo,
int dev_loss_tmo);
extern int srp_reconnect_rport(struct srp_rport *rport);
extern void srp_start_tl_fail_timers(struct srp_rport *rport);
extern void srp_remove_host(struct Scsi_Host *);
/**
* srp_chkready() - evaluate the transport layer state before I/O
*
* Returns a SCSI result code that can be returned by the LLD queuecommand()
* implementation. The role of this function is similar to that of
* fc_remote_port_chkready().
*/
static inline int srp_chkready(struct srp_rport *rport)
{
switch (rport->state) {
case SRP_RPORT_RUNNING:
case SRP_RPORT_BLOCKED:
default:
return 0;
case SRP_RPORT_FAIL_FAST:
return DID_TRANSPORT_FAILFAST << 16;
case SRP_RPORT_LOST:
return DID_NO_CONNECT << 16;
}
}
#endif