user/sven/linux.git/include/target, branch v5.10.76

scsi: target: core: Add cmd length set before cmd complete

2021-03-17T16:06:25Z

[ Upstream commit 1c73e0c5e54d5f7d77f422a10b03ebe61eaed5ad ] TCM doesn't properly handle underflow case for service actions. One way to prevent it is to always complete command with target_complete_cmd_with_length(), however it requires access to data_sg, which is not always available. This change introduces target_set_cmd_data_length() function which allows to set command data length before completing it. Link: https://lore.kernel.org/r/20210209072202.41154-2-a.miloserdov@yadro.com Reviewed-by: Roman Bolshakov Reviewed-by: Bodo Stroesser Signed-off-by: Aleksandr Miloserdov Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin

scsi: target: Make iscsit_register_transport() return void

2020-08-05T00:56:56Z

This function always returns 0. We can make it return void to simplify the code. Also, no caller ever checks the return value of this function. Link: https://lore.kernel.org/r/20200803150008.83920-1-maxg@mellanox.com Signed-off-by: Max Gurtovoy Signed-off-by: Martin K. Petersen

scsi: target: Add tmr_notify backend function

2020-07-29T02:25:26Z

Target core is modified to call an optional backend callback function if a TMR is received or commands are aborted implicitly after a PR command was received. The backend function takes as parameters the se_dev, the type of the TMR, and the list of aborted commands. If no commands were aborted, an empty list is supplied. Link: https://lore.kernel.org/r/20200726153510.13077-3-bstroesser@ts.fujitsu.com Reviewed-by: Mike Christie Signed-off-by: Bodo Stroesser Signed-off-by: Martin K. Petersen

scsi: target: iscsi: Fix login error when receiving

2020-07-29T02:15:30Z

iscsi_target_sk_data_ready() could be invoked indirectly by iscsi_target_do_login_rx() from the workqueue like this: iscsi_target_do_login_rx() iscsi_target_do_login() iscsi_target_do_tx_login_io() iscsit_put_login_tx() iscsi_login_tx_data() tx_data() sock_sendmsg_nosec() tcp_sendmsg() release_sock() sk_backlog_rcv() tcp_v4_do_rcv() tcp_data_ready() iscsi_target_sk_data_ready() At that time LOGIN_FLAGS_READ_ACTIVE is not cleared and iscsi_target_sk_data_ready will not read data from the socket. Some iscsi initiators (libiscsi) will wait forever for a reply. LOGIN_FLAGS_READ_ACTIVE should be cleared early just after doing the receive and before writing to the socket in iscsi_target_do_login_rx. Unfortunately, LOGIN_FLAGS_READ_ACTIVE is also used by sk_state_change to do login cleanup if a socket was closed at login time. It is supposed to be cleared after the login PDU is successfully processed and replied. Introduce another flag, LOGIN_FLAGS_WRITE_ACTIVE, to cover the transmit part. Link: https://lore.kernel.org/r/20200716100212.4237-2-houpu@bytedance.com Reviewed-by: Mike Christie Signed-off-by: Hou Pu Signed-off-by: Martin K. Petersen

scsi: target: Rename target_setup_cmd_from_cdb() to target_cmd_parse_cdb()

2020-06-10T01:57:26Z

This commit also removes the unused argument, cdb, that was passed to this function. Link: https://lore.kernel.org/r/1591559913-8388-5-git-send-email-sudhakar.panneerselvam@oracle.com Reviewed-by: Mike Christie Signed-off-by: Sudhakar Panneerselvam Signed-off-by: Martin K. Petersen

scsi: target: Initialize LUN in transport_init_se_cmd()

2020-06-10T01:57:26Z

Initialization of orig_fe_lun is moved to transport_init_se_cmd() from transport_lookup_cmd_lun(). This helps for the cases where the SCSI request fails before the call to transport_lookup_cmd_lun() so that trace_target_cmd_complete() can print the LUN information to the trace buffer. Due to this change, the lun parameter is removed from transport_lookup_cmd_lun() and transport_lookup_tmr_lun(). Link: https://lore.kernel.org/r/1591559913-8388-3-git-send-email-sudhakar.panneerselvam@oracle.com Reviewed-by: Mike Christie Signed-off-by: Sudhakar Panneerselvam Signed-off-by: Martin K. Petersen

scsi: target: Factor out a new helper, target_cmd_init_cdb()

2020-06-10T01:57:26Z

target_setup_cmd_from_cdb() is called after a successful call to transport_lookup_cmd_lun(). The new helper factors out the code that can be called before the call to transport_lookup_cmd_lun(). This helper will be used in an upcoming commit to address NULL pointer dereference. Link: https://lore.kernel.org/r/1591559913-8388-2-git-send-email-sudhakar.panneerselvam@oracle.com Reviewed-by: Mike Christie Signed-off-by: Sudhakar Panneerselvam Signed-off-by: Martin K. Petersen

scsi: target: tcmu: Make pgr_support and alua_support attributes writable

2020-05-08T02:39:22Z

Currently in tcmu reservation commands are handled by core's pr implementation (default) or completely rejected (emulate_pr set to 0). We additionally want to be able to do full reservation handling in userspace. Therefore we need a way to set TRANSPORT_FLAG_PASSTHROUGH_PGR. The inverted flag is displayed by attribute pgr_support. Since we moved the flag from transport/backend to se_device in the previous commit, we now can make it changeable per device by allowing to write the attribute. The new field transport_flags_changeable in transport/backend is used to reject writing if not allowed for a backend. Regarding ALUA we also want to be able to passthrough commands to userspace in tcmu. Therefore we need TRANSPORT_FLAG_PASSTHROUGH_ALUA to be changeable, because by setting it we can switch off all ALUA checks in core. So we also set TRANSPORT_FLAG_PASSTHROUGH_ALUA in tcmu's transport_flags_changeable. Of course, ALUA and reservation handling in userspace will work only, if session/nexus information is sent to userspace along with every command. This will be object of a patch series announced by Mike Christie. Link: https://lore.kernel.org/r/20200427150823.15350-5-bstroesser@ts.fujitsu.com Reviewed-by: Mike Christie Signed-off-by: Bodo Stroesser Signed-off-by: Martin K. Petersen

scsi: target: Make transport_flags per device

2020-05-08T02:39:21Z

pgr_support and alua_support device attributes show the inverted value of the transport_flags: * TRANSPORT_FLAG_PASSTHROUGH_PGR * TRANSPORT_FLAG_PASSTHROUGH_ALUA These attributes are per device, while the flags are per backend. Rename the transport_flags in backend/transport to transport_flags_default and use this value to initialize the new transport_flags field in the se_device structure. Now data and attribute both are per se_device. Link: https://lore.kernel.org/r/20200427150823.15350-4-bstroesser@ts.fujitsu.com Reviewed-by: Mike Christie Signed-off-by: Bodo Stroesser Signed-off-by: Martin K. Petersen

scsi: target: tcmu: Add attributes enforce_pr_isids and force_pr_aptpl

2020-05-08T02:39:18Z

tcmu has not set TRANSPORT_FLAG_PASSTHROUGH_PGR. Therefore the in-core pr emulation is active by default, but there are some attributes for configuration missing. Add them. Link: https://lore.kernel.org/r/20200427150823.15350-3-bstroesser@ts.fujitsu.com Reviewed-by: Mike Christie Signed-off-by: Bodo Stroesser Signed-off-by: Martin K. Petersen