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authorChristoph Hellwig <hch@infradead.org>2011-11-03 17:50:41 -0400
committerNicholas Bellinger <nab@linux-iscsi.org>2011-11-04 08:00:17 +0000
commit617c0e06c1b30b799d8b25f92eefdc1b098cb9f8 (patch)
treec256c38e2bbf9fb1a17cd5d821efca0839060821 /drivers/target/target_core_pr.c
parenteacac00ce5bfde8086cd0615fb53c986f7f970fe (diff)
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>
Diffstat (limited to 'drivers/target/target_core_pr.c')
-rw-r--r--drivers/target/target_core_pr.c62
1 files changed, 35 insertions, 27 deletions
diff --git a/drivers/target/target_core_pr.c b/drivers/target/target_core_pr.c
index 830953a743d..34403e80b87 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)