Added a new rport state FC_PORTSTATE_MARGINAL.
Added a new inline function fc_rport_chkmarginal_set_noretries
which will set the SCMD_NORETRIES_ABORT bit in cmd->state if rport state
is marginal.
Added a new argumet scsi_cmnd to the function fc_remote_port_chkready.
Made changes in fc_remote_port_chkready function to treat marginal and
online as same.If scsi_cmd is passed fc_rport_chkmarginal_set_noretries
will be called.
Also made changes in fc_remote_port_delete,fc_user_scan_tgt,
fc_timeout_deleted_rport functions to handle the new rport state
FC_PORTSTATE_MARGINAL.
Signed-off-by: Muneendra <muneendra.kumar@xxxxxxxxxxxx>
---
v3:
Rearranged the patch so that all the changes with respect to new
rport state is part of this patch.
Added a new argument to scsi_cmd to fc_remote_port_chkready
v2:
New patch
---
drivers/scsi/scsi_transport_fc.c | 40 +++++++++++++++++++-------------
include/scsi/scsi_transport_fc.h | 26 ++++++++++++++++++++-
2 files changed, 49 insertions(+), 17 deletions(-)
diff --git a/drivers/scsi/scsi_transport_fc.c b/drivers/scsi/scsi_transport_fc.c
index 2ff7f06203da..df66a51d62e6 100644
--- a/drivers/scsi/scsi_transport_fc.c
+++ b/drivers/scsi/scsi_transport_fc.c
@@ -142,20 +142,23 @@ fc_enum_name_search(host_event_code, fc_host_event_code,
static struct {
enum fc_port_state value;
char *name;
+ int matchlen;
} fc_port_state_names[] = {
- { FC_PORTSTATE_UNKNOWN, "Unknown" },
- { FC_PORTSTATE_NOTPRESENT, "Not Present" },
- { FC_PORTSTATE_ONLINE, "Online" },
- { FC_PORTSTATE_OFFLINE, "Offline" },
- { FC_PORTSTATE_BLOCKED, "Blocked" },
- { FC_PORTSTATE_BYPASSED, "Bypassed" },
- { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" },
- { FC_PORTSTATE_LINKDOWN, "Linkdown" },
- { FC_PORTSTATE_ERROR, "Error" },
- { FC_PORTSTATE_LOOPBACK, "Loopback" },
- { FC_PORTSTATE_DELETED, "Deleted" },
+ { FC_PORTSTATE_UNKNOWN, "Unknown", 7},
+ { FC_PORTSTATE_NOTPRESENT, "Not Present", 11 },
+ { FC_PORTSTATE_ONLINE, "Online", 6 },
+ { FC_PORTSTATE_OFFLINE, "Offline", 7 },
+ { FC_PORTSTATE_BLOCKED, "Blocked", 7 },
+ { FC_PORTSTATE_BYPASSED, "Bypassed", 8 },
+ { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics", 11 },
+ { FC_PORTSTATE_LINKDOWN, "Linkdown", 8 },
+ { FC_PORTSTATE_ERROR, "Error", 5 },
+ { FC_PORTSTATE_LOOPBACK, "Loopback", 8 },
+ { FC_PORTSTATE_DELETED, "Deleted", 7 },
+ { FC_PORTSTATE_MARGINAL, "Marginal", 8 },
};
fc_enum_name_search(port_state, fc_port_state, fc_port_state_names)
+fc_enum_name_match(port_state, fc_port_state, fc_port_state_names)
#define FC_PORTSTATE_MAX_NAMELEN 20
@@ -2095,7 +2098,8 @@ fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
if (rport->scsi_target_id == -1)
continue;
- if (rport->port_state != FC_PORTSTATE_ONLINE)
+ if ((rport->port_state != FC_PORTSTATE_ONLINE) &&
+ (rport->port_state != FC_PORTSTATE_MARGINAL))
continue;
if ((channel == rport->channel) &&
@@ -2958,7 +2962,8 @@ fc_remote_port_delete(struct fc_rport *rport)
spin_lock_irqsave(shost->host_lock, flags);
- if (rport->port_state != FC_PORTSTATE_ONLINE) {
+ if ((rport->port_state != FC_PORTSTATE_ONLINE) &&
+ (rport->port_state != FC_PORTSTATE_MARGINAL)) {
spin_unlock_irqrestore(shost->host_lock, flags);
return;
}
@@ -3100,7 +3105,8 @@ fc_timeout_deleted_rport(struct work_struct *work)
* target, validate it still is. If not, tear down the
* scsi_target on it.
*/
- if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
+ if (((rport->port_state == FC_PORTSTATE_ONLINE) ||
+ (rport->port_state == FC_PORTSTATE_MARGINAL)) &&
(rport->scsi_target_id != -1) &&
!(rport->roles & FC_PORT_ROLE_FCP_TARGET)) {
dev_printk(KERN_ERR, &rport->dev,
@@ -3243,7 +3249,8 @@ fc_scsi_scan_rport(struct work_struct *work)
struct fc_internal *i = to_fc_internal(shost->transportt);
unsigned long flags;
- if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
+ if (((rport->port_state == FC_PORTSTATE_ONLINE) ||
+ (rport->port_state == FC_PORTSTATE_ONLINE)) &&
(rport->roles & FC_PORT_ROLE_FCP_TARGET) &&
!(i->f->disable_target_scan)) {
scsi_scan_target(&rport->dev, rport->channel,
@@ -3747,7 +3754,8 @@ static blk_status_t fc_bsg_rport_prep(struct fc_rport *rport)
!(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT))
return BLK_STS_RESOURCE;
- if (rport->port_state != FC_PORTSTATE_ONLINE)
+ if ((rport->port_state != FC_PORTSTATE_ONLINE) &&
+ (rport->port_state != FC_PORTSTATE_MARGINAL))
return BLK_STS_IOERR;
return BLK_STS_OK;
diff --git a/include/scsi/scsi_transport_fc.h b/include/scsi/scsi_transport_fc.h
index 1c7dd35cb7a0..7d010324c1e3 100644
--- a/include/scsi/scsi_transport_fc.h
+++ b/include/scsi/scsi_transport_fc.h
@@ -14,6 +14,7 @@
#include <linux/bsg-lib.h>
#include <asm/unaligned.h>
#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_netlink.h>
#include <scsi/scsi_host.h>
@@ -67,6 +68,7 @@ enum fc_port_state {
FC_PORTSTATE_ERROR,
FC_PORTSTATE_LOOPBACK,
FC_PORTSTATE_DELETED,
+ FC_PORTSTATE_MARGINAL,
};
@@ -707,6 +709,23 @@ struct fc_function_template {
unsigned long disable_target_scan:1;
};
+/**
+ * fc_rport_chkmarginal_set_noretries - Set the SCMD_NORETRIES_ABORT bit
+ * in cmd->state if port state is marginal prior to initiating
+ * io to the port.
+ * @rport: remote port to be checked
+ * @scmd: scsi_cmd to set/clear the SCMD_NORETRIES_ABORT bit on Marginal state
+ **/
+static inline void
+fc_rport_chkmarginal_set_noretries(struct fc_rport *rport, struct scsi_cmnd *cmd)
+{
+ if ((rport->port_state == FC_PORTSTATE_MARGINAL) &&
+ (cmd->request->cmd_flags & REQ_FAILFAST_TRANSPORT))
+ set_bit(SCMD_NORETRIES_ABORT, &cmd->state);
+ else
+ clear_bit(SCMD_NORETRIES_ABORT, &cmd->state);
+
+}
/**
* fc_remote_port_chkready - called to validate the remote port state
@@ -715,20 +734,25 @@ struct fc_function_template {
* Returns a scsi result code that can be returned by the LLDD.
*
* @rport: remote port to be checked
+ * @cmd: scsi_cmd to set/clear the SCMD_NORETRIES_ABORT bit on Marginal state
**/
static inline int
-fc_remote_port_chkready(struct fc_rport *rport)
+fc_remote_port_chkready(struct fc_rport *rport, struct scsi_cmnd *cmd)
{
int result;
switch (rport->port_state) {
case FC_PORTSTATE_ONLINE:
+ case FC_PORTSTATE_MARGINAL:
if (rport->roles & FC_PORT_ROLE_FCP_TARGET)
result = 0;
else if (rport->flags & FC_RPORT_DEVLOSS_PENDING)
result = DID_IMM_RETRY << 16;
else
result = DID_NO_CONNECT << 16;
+
+ if (cmd)
+ fc_rport_chkmarginal_set_noretries(rport, cmd);
break;
case FC_PORTSTATE_BLOCKED:
if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)
--
2.26.2
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