diff options
author | Christoph Hellwig <hch@infradead.org> | 2011-11-03 21:50:41 (GMT) |
---|---|---|
committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2011-11-04 08:00:17 (GMT) |
commit | 617c0e06c1b30b799d8b25f92eefdc1b098cb9f8 (patch) | |
tree | c256c38e2bbf9fb1a17cd5d821efca0839060821 | |
parent | eacac00ce5bfde8086cd0615fb53c986f7f970fe (diff) | |
download | linux-617c0e06c1b30b799d8b25f92eefdc1b098cb9f8.tar.xz |
target: split core_scsi3_emulate_pr
Split core_scsi2_emulate_crh into one routine each for the
PERSISTENT_RESERVE_IN and PERSISTENT_RESERVE_OUT side.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
-rw-r--r-- | drivers/target/target_core_pr.c | 62 | ||||
-rw-r--r-- | drivers/target/target_core_pr.h | 4 | ||||
-rw-r--r-- | drivers/target/target_core_transport.c | 11 |
3 files changed, 45 insertions, 32 deletions
diff --git a/drivers/target/target_core_pr.c b/drivers/target/target_core_pr.c index 830953a..34403e80 100644 --- a/drivers/target/target_core_pr.c +++ b/drivers/target/target_core_pr.c @@ -3734,12 +3734,30 @@ static unsigned long long core_scsi3_extract_reservation_key(unsigned char *cdb) /* * See spc4r17 section 6.14 Table 170 */ -static int core_scsi3_emulate_pr_out(struct se_cmd *cmd, unsigned char *cdb) +int target_scsi3_emulate_pr_out(struct se_cmd *cmd) { + unsigned char *cdb = &cmd->t_task_cdb[0]; unsigned char *buf; u64 res_key, sa_res_key; int sa, scope, type, aptpl; int spec_i_pt = 0, all_tg_pt = 0, unreg = 0; + + /* + * Following spc2r20 5.5.1 Reservations overview: + * + * If a logical unit has been reserved by any RESERVE command and is + * still reserved by any initiator, all PERSISTENT RESERVE IN and all + * PERSISTENT RESERVE OUT commands shall conflict regardless of + * initiator or service action and shall terminate with a RESERVATION + * CONFLICT status. + */ + if (cmd->se_dev->dev_flags & DF_SPC2_RESERVATIONS) { + pr_err("Received PERSISTENT_RESERVE CDB while legacy" + " SPC-2 reservation is held, returning" + " RESERVATION_CONFLICT\n"); + return PYX_TRANSPORT_RESERVATION_CONFLICT; + } + /* * FIXME: A NULL struct se_session pointer means an this is not coming from * a $FABRIC_MOD's nexus, but from internal passthrough ops. @@ -4185,29 +4203,8 @@ static int core_scsi3_pri_read_full_status(struct se_cmd *cmd) return 0; } -static int core_scsi3_emulate_pr_in(struct se_cmd *cmd, unsigned char *cdb) -{ - switch (cdb[1] & 0x1f) { - case PRI_READ_KEYS: - return core_scsi3_pri_read_keys(cmd); - case PRI_READ_RESERVATION: - return core_scsi3_pri_read_reservation(cmd); - case PRI_REPORT_CAPABILITIES: - return core_scsi3_pri_report_capabilities(cmd); - case PRI_READ_FULL_STATUS: - return core_scsi3_pri_read_full_status(cmd); - default: - pr_err("Unknown PERSISTENT_RESERVE_IN service" - " action: 0x%02x\n", cdb[1] & 0x1f); - return PYX_TRANSPORT_INVALID_CDB_FIELD; - } - -} - -int core_scsi3_emulate_pr(struct se_cmd *cmd) +int target_scsi3_emulate_pr_in(struct se_cmd *cmd) { - unsigned char *cdb = &cmd->t_task_cdb[0]; - struct se_device *dev = cmd->se_dev; /* * Following spc2r20 5.5.1 Reservations overview: * @@ -4217,16 +4214,27 @@ int core_scsi3_emulate_pr(struct se_cmd *cmd) * initiator or service action and shall terminate with a RESERVATION * CONFLICT status. */ - if (dev->dev_flags & DF_SPC2_RESERVATIONS) { + if (cmd->se_dev->dev_flags & DF_SPC2_RESERVATIONS) { pr_err("Received PERSISTENT_RESERVE CDB while legacy" " SPC-2 reservation is held, returning" " RESERVATION_CONFLICT\n"); return PYX_TRANSPORT_RESERVATION_CONFLICT; } - return (cdb[0] == PERSISTENT_RESERVE_OUT) ? - core_scsi3_emulate_pr_out(cmd, cdb) : - core_scsi3_emulate_pr_in(cmd, cdb); + switch (cmd->t_task_cdb[1] & 0x1f) { + case PRI_READ_KEYS: + return core_scsi3_pri_read_keys(cmd); + case PRI_READ_RESERVATION: + return core_scsi3_pri_read_reservation(cmd); + case PRI_REPORT_CAPABILITIES: + return core_scsi3_pri_report_capabilities(cmd); + case PRI_READ_FULL_STATUS: + return core_scsi3_pri_read_full_status(cmd); + default: + pr_err("Unknown PERSISTENT_RESERVE_IN service" + " action: 0x%02x\n", cmd->t_task_cdb[1] & 0x1f); + return PYX_TRANSPORT_INVALID_CDB_FIELD; + } } static int core_pt_reservation_check(struct se_cmd *cmd, u32 *pr_res_type) diff --git a/drivers/target/target_core_pr.h b/drivers/target/target_core_pr.h index 4e94a42..c9acb11 100644 --- a/drivers/target/target_core_pr.h +++ b/drivers/target/target_core_pr.h @@ -62,7 +62,9 @@ extern void core_scsi3_free_all_registrations(struct se_device *); extern unsigned char *core_scsi3_pr_dump_type(int); extern int core_scsi3_check_cdb_abort_and_preempt(struct list_head *, struct se_cmd *); -extern int core_scsi3_emulate_pr(struct se_cmd *); + +extern int target_scsi3_emulate_pr_in(struct se_cmd *cmd); +extern int target_scsi3_emulate_pr_out(struct se_cmd *cmd); extern int core_setup_reservations(struct se_device *, int); #endif /* TARGET_CORE_PR_H */ diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c index f423293..717f84a 100644 --- a/drivers/target/target_core_transport.c +++ b/drivers/target/target_core_transport.c @@ -2842,11 +2842,14 @@ static int transport_generic_cmd_sequencer( cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; break; case PERSISTENT_RESERVE_IN: + if (su_dev->t10_pr.res_type == SPC3_PERSISTENT_RESERVATIONS) + cmd->transport_emulate_cdb = target_scsi3_emulate_pr_in; + size = (cdb[7] << 8) + cdb[8]; + cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; + break; case PERSISTENT_RESERVE_OUT: - cmd->transport_emulate_cdb = - (su_dev->t10_pr.res_type == - SPC3_PERSISTENT_RESERVATIONS) ? - core_scsi3_emulate_pr : NULL; + if (su_dev->t10_pr.res_type == SPC3_PERSISTENT_RESERVATIONS) + cmd->transport_emulate_cdb = target_scsi3_emulate_pr_out; size = (cdb[7] << 8) + cdb[8]; cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; break; |