linux/include/target, branch v3.13

target/file: Update hw_max_sectors based on current block_size

2013-12-19T08:18:54Z

This patch allows FILEIO to update hw_max_sectors based on the current max_bytes_per_io. This is required because vfs_[writev,readv]() can accept a maximum of 2048 iovecs per call, so the enforced hw_max_sectors really needs to be calculated based on block_size. This addresses a >= v3.5 bug where block_size=512 was rejecting > 1M sized I/O requests, because FD_MAX_SECTORS was hardcoded to 2048 for the block_size=4096 case. (v2: Use max_bytes_per_io instead of ->update_hw_max_sectors) Reported-by: Henrik Goldman Cc: #3.5+ Signed-off-by: Nicholas Bellinger

target: Remove write-only stats fields and lock from struct se_node_acl

2013-12-11T18:59:45Z

Commit 04f3b31bff72 ("iscsi-target: Convert iscsi_session statistics to atomic_long_t") removed the updating of these fields in iscsi (the only fabric driver that ever touched these counters), and the core has no way to report or otherwise use the values. Remove the last remnants of these counters. Signed-off-by: Roland Dreier Signed-off-by: Nicholas Bellinger

target_core_alua: Store supported ALUA states

2013-11-20T19:26:37Z

The supported ALUA states might be different for individual devices, so store it in a separate field. (nab: Remove unnecessary line continuation) Signed-off-by: Hannes Reinecke Signed-off-by: Nicholas Bellinger

target core: rename (ex,im)plict -> (ex,im)plicit

2013-11-20T19:24:40Z

Signed-off-by: Hannes Reinecke Signed-off-by: Nicholas Bellinger

target: Convert se_device statistics to atomic_long_t

2013-11-14T02:34:55Z

This patch converts the handful of se_device statistics to type atomic_long_t, instead of using se_device->stats_lock when incrementing these values. More importantly, go ahead and drop the spinlock usage within transport_lookup_cmd_lun() fast-path code. Signed-off-by: Nicholas Bellinger

target: Pass through I/O topology for block backstores

2013-11-12T21:44:54Z

In addition to block size (already implemented), passing through alignment offset, logical-to-phys block exponent, I/O granularity and optimal I/O length will allow initiators to properly handle layout on LUNs with 4K block sizes. Tested with various weird values via scsi_debug module. One thing to look at with this patch is the new block limits values -- instead of granularity 1 optimal 8192, Lio will now be returning whatever the block device says, which may affect performance. Signed-off-by: Andy Grover Acked-by: Martin K. Petersen Signed-off-by: Nicholas Bellinger

target: Add per device xcopy_lun for copy offload I/O

2013-11-08T21:13:38Z

This patch adds a se_device->xcopy_lun that is used for local copy offload I/O, instead of allocating + initializing a pseudo se_lun for each received EXTENDED_COPY operation. Also, move declaration of struct se_lun + struct se_port_stat_grps ahead of struct se_device. Signed-off-by: Nicholas Bellinger

target: Drop left-over se_lun->lun_cmd_list shutdown code

2013-11-07T22:25:02Z

Now with percpu refcounting for se_lun in place, go ahead and drop the legacy per se_cmd accounting for se_lun shutdown. This includes __transport_clear_lun_from_sessions(), the associated transport_lun_wait_for_tasks() logic, along with a handful of now unused se_cmd structure members and ->transport_state bits. Cc: Kent Overstreet Signed-off-by: Nicholas Bellinger

target: Add percpu refcounting for se_lun access

2013-11-07T22:24:52Z

This patch adds percpu refcounting for se_lun access that allows the association of an se_lun + se_cmd in transport_lookup_cmd_lun() to occur without an extra list_head for tracking outstanding I/O during se_lun shutdown. This effectively changes se_lun shutdown logic to wait for outstanding I/O percpu references to complete in transport_lun_remove_cmd() using se_lun->lun_ref_comp, instead of explicitly draining the per se_lun command list and waiting for individual se_cmd descriptor processing to complete. Cc: Kent Overstreet Signed-off-by: Nicholas Bellinger

target: Export symbol core_tpg_check_initiator_node_acl

2013-10-24T04:30:07Z

Export symbol core_tpg_check_initiator_node_acl and move prototype from the private drivers/target/target_core_internal.h to the public include/target/target_core_fabric.h Signed-off-by: Thomas Glanzmann Signed-off-by: Nicholas Bellinger