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| author |   Nicholas Bellinger <nab@linux-iscsi.org> | 2011-11-04 02:36:16 -0700 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2011-12-06 06:00:49 +0000 |
| commit | 03e98c9eb916f3f0868c1dc344dde2a60287ff72 (patch) | |
| tree | cfa47c1cec5b0a589b868c34310ee25f6a6a1939 /drivers/target/loopback | |
| parent | Linux 3.2-rc4 (diff) | |
| download | linux-dev-03e98c9eb916f3f0868c1dc344dde2a60287ff72.tar.xz linux-dev-03e98c9eb916f3f0868c1dc344dde2a60287ff72.zip | |
target: Address legacy PYX_TRANSPORT_* return code breakage
This patch removes legacy usage of PYX_TRANSPORT_* return codes in a number
of locations and addresses cases where transport_generic_request_failure()
was returning the incorrect sense upon CHECK_CONDITION status after the
v3.1 converson to use errno return codes.
This includes the conversion of transport_generic_request_failure() to
process cmd->scsi_sense_reason and handle extra TCM_RESERVATION_CONFLICT
before calling transport_send_check_condition_and_sense() to queue up
response status. It also drops PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES legacy
usgae, and returns TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE w/ a response
for these cases.
transport_generic_allocate_tasks(), transport_generic_new_cmd(), backend
SCF_SCSI_DATA_SG_IO_CDB ->do_task(), and emulated ->execute_task() have
all been updated to set se_cmd->scsi_sense_reason and return errno codes
universally upon failure. This includes cmd->scsi_sense_reason assignment
in target_core_alua.c, target_core_pr.c and target_core_cdb.c emulation code.
Finally it updates fabric modules to remove the legacy usage, and for
TFO->new_cmd_map() callers forwards return values outside of fabric code.
iscsi-target has also been updated to remove a handful of special cases
related to the cleanup and signaling QUEUE_FULL handling w/ ft_write_pending()
(v2: Drop extra SCF_SCSI_CDB_EXCEPTION check during failure from
transport_generic_new_cmd, and re-add missing task->task_error_status
assignment in transport_complete_task)
Cc: Christoph Hellwig <hch@lst.de>
Cc: stable@kernel.org
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target/loopback')
| -rw-r--r-- | drivers/target/loopback/tcm_loop.c | 24 |
1 files changed, 3 insertions, 21 deletions
diff --git a/drivers/target/loopback/tcm_loop.c b/drivers/target/loopback/tcm_loop.c index 3df1c9b8ae6b..cbf5e4513741 100644 --- a/drivers/target/loopback/tcm_loop.c +++ b/drivers/target/loopback/tcm_loop.c @@ -148,22 +148,8 @@ static int tcm_loop_new_cmd_map(struct se_cmd *se_cmd) * Allocate the necessary tasks to complete the received CDB+data */ ret = transport_generic_allocate_tasks(se_cmd, sc->cmnd); - if (ret == -ENOMEM) { - /* Out of Resources */ - return PYX_TRANSPORT_LU_COMM_FAILURE; - } else if (ret == -EINVAL) { - /* - * Handle case for SAM_STAT_RESERVATION_CONFLICT - */ - if (se_cmd->se_cmd_flags & SCF_SCSI_RESERVATION_CONFLICT) - return PYX_TRANSPORT_RESERVATION_CONFLICT; - /* - * Otherwise, return SAM_STAT_CHECK_CONDITION and return - * sense data. - */ - return PYX_TRANSPORT_USE_SENSE_REASON; - } - + if (ret != 0) + return ret; /* * For BIDI commands, pass in the extra READ buffer * to transport_generic_map_mem_to_cmd() below.. @@ -194,12 +180,8 @@ static int tcm_loop_new_cmd_map(struct se_cmd *se_cmd) } /* Tell the core about our preallocated memory */ - ret = transport_generic_map_mem_to_cmd(se_cmd, scsi_sglist(sc), + return transport_generic_map_mem_to_cmd(se_cmd, scsi_sglist(sc), scsi_sg_count(sc), sgl_bidi, sgl_bidi_count); - if (ret < 0) - return PYX_TRANSPORT_LU_COMM_FAILURE; - - return 0; } /* |