kernel/linux.git/include/target/target_core_base.h, branch v3.4.18

target: Add generation of LOGICAL BLOCK ADDRESS OUT OF RANGE

2012-08-09T15:31:26+00:00

commit e2397c704429025bc6b331a970f699e52f34283e upstream. Many SCSI commands are defined to return a CHECK CONDITION / ILLEGAL REQUEST with ASC set to LOGICAL BLOCK ADDRESS OUT OF RANGE if the initiator sends a command that accesses a too-big LBA. Add an enum value and case entries so that target code can return this status. Signed-off-by: Roland Dreier Signed-off-by: Nicholas Bellinger Signed-off-by: Greg Kroah-Hartman

target: Use array_zalloc for device_list

2012-03-16T02:15:51+00:00

Turns an order-8 allocation into slab-sized ones, thereby preventing allocation failures with memory fragmentation. This likely saves memory as well, as the slab allocator can pack objects more tightly than the buddy allocator. (nab: Fix lio-core patch fuzz) Signed-off-by: Joern Engel Signed-off-by: Nicholas Bellinger

target: Use array_zalloc for tpg_lun_list

2012-03-16T02:15:38+00:00

Turns an order-10 allocation into slab-sized ones, thereby preventing allocation failures with memory fragmentation. This likely saves memory as well, as the slab allocator can pack objects more tightly than the buddy allocator. Signed-off-by: Joern Engel Signed-off-by: Nicholas Bellinger

target: Bump core version to v4.1.0-rc2-ml + fabric versions

2012-03-10T22:55:17+00:00

Bump core version to v4.1.0-rc2-ml, and for versions from the following mainline fabric modules: loopback: v2.1-rc2 tcm_fc: v0.4 iscsi-target: v4.1.0-rc2 Signed-off-by: Nicholas Bellinger

target: Convert se_node_acl->acl_group removal to use ->acl_kref

2012-03-10T22:42:19+00:00

This patch converts core_tpg_del_initiator_node_acl() shutdown from configfs context to use se_node_acl->acl_kref and ->acl_free_comp in order to wait for outstanding fabric callbacks to complete via transport_deregister_session() callbacks before waking ->acl_free_comp from the last ->acl_kref put. It also changes core_tpg_del_initiator_node_acl() to setup a local sess_list with target_get_session() + acl->acl_stop = 1 for active sessions that will be shutdown, and changes transport_deregister_session_configfs() to check for ->acl_stop usage. Cc: Roland Dreier Cc: Christoph Hellwig Cc: Joern Engel Cc: Andy Grover Signed-off-by: Nicholas Bellinger

target: Add se_node_acl->acl_kref for ->acl_free_comp usage

2012-03-10T22:42:09+00:00

This patch adds se_node_acl->acl_kref for use with ->acl_free_comp during explict se_node_acl release. It adds kref_init() during se_node_acl setup, kref_get() during __transport_register_session() -> target_put_nacl() with existing transport_deregister_session() fabric callback usage. It also moves transport_free_session() to release *se_sess memory after target_put_nacl() execution in transport_deregister_session() Cc: Roland Dreier Cc: Christoph Hellwig Cc: Joern Engel Cc: Andy Grover Signed-off-by: Nicholas Bellinger

target: Add se_node_acl->acl_free_comp for NodeACL release path

2012-03-10T22:41:59+00:00

Add se_node_acl->acl_free_comp for NodeACL release path to wait for outstanding fabric session shutdown to complete in transport_deregister_session() before finishing NodeACL release from configfs process context. Also make transport_deregister_session() clear the comp_nacl bit to skip se_node_acl->acl_free_comp completion for dynamically generated NodeACL during fabric session shutdown. Cc: Roland Dreier Cc: Christoph Hellwig Cc: Joern Engel Cc: Andy Grover Signed-off-by: Nicholas Bellinger

target: Add se_sess->sess_kref + get/put helpers

2012-03-10T22:41:53+00:00

This patch adds basic se_session->sess_kref and get/put helpers for fabric session reference counting. It sets the initial kref in transport_init_session() and adds a target_release_session() callback to invoke TFO->close_session() for final session shutdown. Cc: Roland Dreier Cc: Christoph Hellwig Cc: Joern Engel Cc: Andy Grover Signed-off-by: Nicholas Bellinger

target: Untangle front-end and back-end meanings of max_sectors attribute

2012-02-25T22:37:49+00:00

se_dev_attrib.max_sectors currently has two independent meanings: - It is reported in the block limits VPD page as the maximum transfer length, ie the largest IO that the front-end (fabric) can handle. Also the target core doesn't enforce this maximum transfer length. - It is used to hold the size of the largest IO that the back-end can handle, so we know when to split SCSI commands into multiple tasks. Fix this by adding a new se_dev_attrib.fabric_max_sectors to hold the maximum transfer length, and checking incoming IOs against that limit. Signed-off-by: Roland Dreier Signed-off-by: Nicholas Bellinger

target: Fix up handling of short INQUIRY buffers

2012-02-25T22:37:49+00:00

If the initiator sends us an INQUIRY command with an allocation length that's shorter than what we want to return, we're simply supposed to truncate our response and return what the initiator gave us space for, without signaling any error. Current target code has various tests that don't fill out the full response if the buffer is too short and sometimes return errors incorrectly. Fix this up by allocating a bounce buffer for INQUIRY responses if we need to, ie if we have cmd->data_length too small as well as SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC set in cmd->se_cmd_flags -- for most fabrics, we always allocate at least a full page, but for tcm_loop we may have a small buffer coming directly from the SCSI stack. This lets us delete a lot of cmd->data_length checking, and also makes our INQUIRY handling correct per SPC in a lot more cases. Signed-off-by: Roland Dreier Cc: stable@vger.kernel.org Signed-off-by: Nicholas Bellinger