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path: root/drivers/scsi/fnic
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Diffstat (limited to 'drivers/scsi/fnic')
-rw-r--r--drivers/scsi/fnic/fnic.h2
-rw-r--r--drivers/scsi/fnic/fnic_scsi.c121
2 files changed, 116 insertions, 7 deletions
diff --git a/drivers/scsi/fnic/fnic.h b/drivers/scsi/fnic/fnic.h
index 63b35c8e40bd..b8e6644ad237 100644
--- a/drivers/scsi/fnic/fnic.h
+++ b/drivers/scsi/fnic/fnic.h
@@ -303,6 +303,8 @@ const char *fnic_state_to_str(unsigned int state);
void fnic_log_q_error(struct fnic *fnic);
void fnic_handle_link_event(struct fnic *fnic);
+int fnic_is_abts_pending(struct fnic *, struct scsi_cmnd *);
+
static inline int
fnic_chk_state_flags_locked(struct fnic *fnic, unsigned long st_flags)
{
diff --git a/drivers/scsi/fnic/fnic_scsi.c b/drivers/scsi/fnic/fnic_scsi.c
index 2f46509f5b5a..64830814da0d 100644
--- a/drivers/scsi/fnic/fnic_scsi.c
+++ b/drivers/scsi/fnic/fnic_scsi.c
@@ -1271,7 +1271,8 @@ static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
spin_unlock_irqrestore(io_lock, flags);
} else {
spin_lock_irqsave(io_lock, flags);
- CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
+ if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET)
+ CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
spin_unlock_irqrestore(io_lock, flags);
}
}
@@ -1379,7 +1380,8 @@ void fnic_terminate_rport_io(struct fc_rport *rport)
spin_unlock_irqrestore(io_lock, flags);
} else {
spin_lock_irqsave(io_lock, flags);
- CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
+ if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET)
+ CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
spin_unlock_irqrestore(io_lock, flags);
}
}
@@ -1592,7 +1594,7 @@ lr_io_req_end:
static int fnic_clean_pending_aborts(struct fnic *fnic,
struct scsi_cmnd *lr_sc)
{
- int tag;
+ int tag, abt_tag;
struct fnic_io_req *io_req;
spinlock_t *io_lock;
unsigned long flags;
@@ -1601,6 +1603,7 @@ static int fnic_clean_pending_aborts(struct fnic *fnic,
struct scsi_lun fc_lun;
struct scsi_device *lun_dev = lr_sc->device;
DECLARE_COMPLETION_ONSTACK(tm_done);
+ enum fnic_ioreq_state old_ioreq_state;
for (tag = 0; tag < FNIC_MAX_IO_REQ; tag++) {
sc = scsi_host_find_tag(fnic->lport->host, tag);
@@ -1629,7 +1632,41 @@ static int fnic_clean_pending_aborts(struct fnic *fnic,
"Found IO in %s on lun\n",
fnic_ioreq_state_to_str(CMD_STATE(sc)));
- BUG_ON(CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING);
+ if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
+ spin_unlock_irqrestore(io_lock, flags);
+ continue;
+ }
+ if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
+ (!(CMD_FLAGS(sc) & FNIC_DEV_RST_PENDING))) {
+ FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
+ "%s dev rst not pending sc 0x%p\n", __func__,
+ sc);
+ spin_unlock_irqrestore(io_lock, flags);
+ continue;
+ }
+ old_ioreq_state = CMD_STATE(sc);
+ /*
+ * Any pending IO issued prior to reset is expected to be
+ * in abts pending state, if not we need to set
+ * FNIC_IOREQ_ABTS_PENDING to indicate the IO is abort pending.
+ * When IO is completed, the IO will be handed over and
+ * handled in this function.
+ */
+ CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
+
+ if (io_req->abts_done)
+ shost_printk(KERN_ERR, fnic->lport->host,
+ "%s: io_req->abts_done is set state is %s\n",
+ __func__, fnic_ioreq_state_to_str(CMD_STATE(sc)));
+
+ BUG_ON(io_req->abts_done);
+
+ abt_tag = tag;
+ if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
+ abt_tag |= FNIC_TAG_DEV_RST;
+ FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
+ "%s: dev rst sc 0x%p\n", __func__, sc);
+ }
CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
io_req->abts_done = &tm_done;
@@ -1638,16 +1675,23 @@ static int fnic_clean_pending_aborts(struct fnic *fnic,
/* Now queue the abort command to firmware */
int_to_scsilun(sc->device->lun, &fc_lun);
- if (fnic_queue_abort_io_req(fnic, tag,
+ if (fnic_queue_abort_io_req(fnic, abt_tag,
FCPIO_ITMF_ABT_TASK_TERM,
fc_lun.scsi_lun, io_req)) {
spin_lock_irqsave(io_lock, flags);
io_req = (struct fnic_io_req *)CMD_SP(sc);
if (io_req)
io_req->abts_done = NULL;
+ if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
+ CMD_STATE(sc) = old_ioreq_state;
spin_unlock_irqrestore(io_lock, flags);
ret = 1;
goto clean_pending_aborts_end;
+ } else {
+ spin_lock_irqsave(io_lock, flags);
+ if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET)
+ CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
+ spin_unlock_irqrestore(io_lock, flags);
}
wait_for_completion_timeout(&tm_done,
@@ -1659,8 +1703,7 @@ static int fnic_clean_pending_aborts(struct fnic *fnic,
io_req = (struct fnic_io_req *)CMD_SP(sc);
if (!io_req) {
spin_unlock_irqrestore(io_lock, flags);
- ret = 1;
- goto clean_pending_aborts_end;
+ continue;
}
io_req->abts_done = NULL;
@@ -1678,6 +1721,12 @@ static int fnic_clean_pending_aborts(struct fnic *fnic,
mempool_free(io_req, fnic->io_req_pool);
}
+ schedule_timeout(msecs_to_jiffies(2 * fnic->config.ed_tov));
+
+ /* walk again to check, if IOs are still pending in fw */
+ if (fnic_is_abts_pending(fnic, lr_sc))
+ ret = FAILED;
+
clean_pending_aborts_end:
return ret;
}
@@ -2142,3 +2191,61 @@ call_fc_exch_mgr_reset:
fc_exch_mgr_reset(lp, sid, did);
}
+
+/*
+ * fnic_is_abts_pending() is a helper function that
+ * walks through tag map to check if there is any IOs pending,if there is one,
+ * then it returns 1 (true), otherwise 0 (false)
+ * if @lr_sc is non NULL, then it checks IOs specific to particular LUN,
+ * otherwise, it checks for all IOs.
+ */
+int fnic_is_abts_pending(struct fnic *fnic, struct scsi_cmnd *lr_sc)
+{
+ int tag;
+ struct fnic_io_req *io_req;
+ spinlock_t *io_lock;
+ unsigned long flags;
+ int ret = 0;
+ struct scsi_cmnd *sc;
+ struct scsi_device *lun_dev = NULL;
+
+ if (lr_sc)
+ lun_dev = lr_sc->device;
+
+ /* walk again to check, if IOs are still pending in fw */
+ for (tag = 0; tag < FNIC_MAX_IO_REQ; tag++) {
+ sc = scsi_host_find_tag(fnic->lport->host, tag);
+ /*
+ * ignore this lun reset cmd or cmds that do not belong to
+ * this lun
+ */
+ if (!sc || (lr_sc && (sc->device != lun_dev || sc == lr_sc)))
+ continue;
+
+ io_lock = fnic_io_lock_hash(fnic, sc);
+ spin_lock_irqsave(io_lock, flags);
+
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+
+ if (!io_req || sc->device != lun_dev) {
+ spin_unlock_irqrestore(io_lock, flags);
+ continue;
+ }
+
+ /*
+ * Found IO that is still pending with firmware and
+ * belongs to the LUN that we are resetting
+ */
+ FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
+ "Found IO in %s on lun\n",
+ fnic_ioreq_state_to_str(CMD_STATE(sc)));
+
+ if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
+ spin_unlock_irqrestore(io_lock, flags);
+ ret = 1;
+ continue;
+ }
+ }
+
+ return ret;
+}
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-15 14:26:16 +0300