Messages in this thread Patch in this message | | | From | Ben Hutchings <> | Date | Mon, 22 Apr 2013 15:25:59 +0100 | Subject | [36/75] target: Fix MAINTENANCE_IN service action CDB checks to use lower 5 bits |
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3.2.44-rc1 review patch. If anyone has any objections, please let me know.
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From: Nicholas Bellinger <nab@linux-iscsi.org>
commit ba539743b70cd160c84bab1c82910d0789b820f8 upstream.
This patch fixes the MAINTENANCE_IN service action type checks to only look at the proper lower 5 bits of cdb byte 1. This addresses the case where MI_REPORT_TARGET_PGS w/ extended header using the upper three bits of cdb byte 1 was not processed correctly in transport_generic_cmd_sequencer, as well as the three cases for standby, unavailable, and transition ALUA primary access state checks.
Also add MAINTENANCE_IN to the excluded list in transport_generic_prepare_cdb() to prevent the PARAMETER DATA FORMAT bits from being cleared.
Cc: Hannes Reinecke <hare@suse.de> Cc: Rob Evers <revers@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Roland Dreier <roland@purestorage.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Ben Hutchings <ben@decadent.org.uk> --- drivers/target/target_core_alua.c | 6 +++--- drivers/target/target_core_transport.c | 3 ++- 2 files changed, 5 insertions(+), 4 deletions(-)
--- a/drivers/target/target_core_alua.c +++ b/drivers/target/target_core_alua.c @@ -394,7 +394,7 @@ static inline int core_alua_state_standb case RECEIVE_DIAGNOSTIC: case SEND_DIAGNOSTIC: case MAINTENANCE_IN: - switch (cdb[1]) { + switch (cdb[1] & 0x1f) { case MI_REPORT_TARGET_PGS: return 0; default: @@ -436,7 +436,7 @@ static inline int core_alua_state_unavai case INQUIRY: case REPORT_LUNS: case MAINTENANCE_IN: - switch (cdb[1]) { + switch (cdb[1] & 0x1f) { case MI_REPORT_TARGET_PGS: return 0; default: @@ -476,7 +476,7 @@ static inline int core_alua_state_transi case INQUIRY: case REPORT_LUNS: case MAINTENANCE_IN: - switch (cdb[1]) { + switch (cdb[1] & 0x1f) { case MI_REPORT_TARGET_PGS: return 0; default: --- a/drivers/target/target_core_transport.c +++ b/drivers/target/target_core_transport.c @@ -1445,6 +1445,7 @@ static inline void transport_generic_pre case VERIFY_16: /* SBC - VRProtect */ case WRITE_VERIFY: /* SBC - VRProtect */ case WRITE_VERIFY_12: /* SBC - VRProtect */ + case MAINTENANCE_IN: /* SPC - Parameter Data Format for SA RTPG */ break; default: cdb[1] &= 0x1f; /* clear logical unit number */ @@ -2683,7 +2684,7 @@ static int transport_generic_cmd_sequenc /* * Check for emulated MI_REPORT_TARGET_PGS. */ - if (cdb[1] == MI_REPORT_TARGET_PGS && + if ((cdb[1] & 0x1f) == MI_REPORT_TARGET_PGS && su_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) { cmd->execute_task = target_emulate_report_target_port_groups;
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