From: Hannes Reinecke <hare@suse.de>
To: Christoph Hellwig <hch@lst.de>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>,
James Bottomley <james.bottomley@hansenpartnership.com>,
linux-scsi@vger.kernel.org, Hannes Reinecke <hare@suse.de>
Subject: [PATCH 03/17] bfa: Do not use scsi command to signal TMF status
Date: Mon, 16 Oct 2023 11:24:16 +0200 [thread overview]
Message-ID: <20231016092430.55557-4-hare@suse.de> (raw)
In-Reply-To: <20231016092430.55557-1-hare@suse.de>
The bfa driver hijacks the scsi command to signal the TMF status,
which will no longer work if the TMF handler will be converted.
So rework TMF handling to not use a scsi command but rather add
new TMF fields to the per-device structure.
Signed-off-by: Hannes Reinecke <hare@suse.de>
---
drivers/scsi/bfa/bfad_im.c | 112 ++++++++++++++++++++-----------------
drivers/scsi/bfa/bfad_im.h | 2 +
2 files changed, 63 insertions(+), 51 deletions(-)
diff --git a/drivers/scsi/bfa/bfad_im.c b/drivers/scsi/bfa/bfad_im.c
index a9d3d8562d3c..ef352fc59458 100644
--- a/drivers/scsi/bfa/bfad_im.c
+++ b/drivers/scsi/bfa/bfad_im.c
@@ -147,13 +147,13 @@ void
bfa_cb_tskim_done(void *bfad, struct bfad_tskim_s *dtsk,
enum bfi_tskim_status tsk_status)
{
- struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dtsk;
+ struct bfad_itnim_data_s *itnim_data =
+ (struct bfad_itnim_data_s *)dtsk;
wait_queue_head_t *wq;
- bfad_priv(cmnd)->status |= tsk_status << 1;
- set_bit(IO_DONE_BIT, &bfad_priv(cmnd)->status);
- wq = bfad_priv(cmnd)->wq;
- bfad_priv(cmnd)->wq = NULL;
+ itnim_data->tmf_status |= tsk_status << 1;
+ set_bit(IO_DONE_BIT, &itnim_data->tmf_status);
+ wq = itnim_data->tmf_wq;
if (wq)
wake_up(wq);
@@ -238,15 +238,16 @@ bfad_im_abort_handler(struct scsi_cmnd *cmnd)
}
static bfa_status_t
-bfad_im_target_reset_send(struct bfad_s *bfad, struct scsi_cmnd *cmnd,
- struct bfad_itnim_s *itnim)
+bfad_im_target_reset_send(struct bfad_s *bfad,
+ struct bfad_itnim_data_s *itnim_data)
{
+ struct bfad_itnim_s *itnim = itnim_data->itnim;
struct bfa_tskim_s *tskim;
struct bfa_itnim_s *bfa_itnim;
bfa_status_t rc = BFA_STATUS_OK;
struct scsi_lun scsilun;
- tskim = bfa_tskim_alloc(&bfad->bfa, (struct bfad_tskim_s *) cmnd);
+ tskim = bfa_tskim_alloc(&bfad->bfa, (struct bfad_tskim_s *) itnim_data);
if (!tskim) {
BFA_LOG(KERN_ERR, bfad, bfa_log_level,
"target reset, fail to allocate tskim\n");
@@ -254,12 +255,6 @@ bfad_im_target_reset_send(struct bfad_s *bfad, struct scsi_cmnd *cmnd,
goto out;
}
- /*
- * Set host_scribble to NULL to avoid aborting a task command if
- * happens.
- */
- cmnd->host_scribble = NULL;
- bfad_priv(cmnd)->status = 0;
bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim->fcs_itnim);
/*
* bfa_itnim can be NULL if the port gets disconnected and the bfa
@@ -290,10 +285,11 @@ bfad_im_target_reset_send(struct bfad_s *bfad, struct scsi_cmnd *cmnd,
static int
bfad_im_reset_lun_handler(struct scsi_cmnd *cmnd)
{
- struct Scsi_Host *shost = cmnd->device->host;
+ struct scsi_device *sdev = cmnd->device;
+ struct Scsi_Host *shost = sdev->host;
struct bfad_im_port_s *im_port =
(struct bfad_im_port_s *) shost->hostdata[0];
- struct bfad_itnim_data_s *itnim_data = cmnd->device->hostdata;
+ struct bfad_itnim_data_s *itnim_data = sdev->hostdata;
struct bfad_s *bfad = im_port->bfad;
struct bfa_tskim_s *tskim;
struct bfad_itnim_s *itnim;
@@ -305,14 +301,20 @@ bfad_im_reset_lun_handler(struct scsi_cmnd *cmnd)
struct scsi_lun scsilun;
spin_lock_irqsave(&bfad->bfad_lock, flags);
+ if (itnim_data->tmf_wq) {
+ BFA_LOG(KERN_ERR, bfad, bfa_log_level,
+ "LUN reset, TMF already active");
+ spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+ rc = FAILED;
+ goto out;
+ }
itnim = itnim_data->itnim;
if (!itnim) {
spin_unlock_irqrestore(&bfad->bfad_lock, flags);
rc = FAILED;
goto out;
}
-
- tskim = bfa_tskim_alloc(&bfad->bfa, (struct bfad_tskim_s *) cmnd);
+ tskim = bfa_tskim_alloc(&bfad->bfa, (struct bfad_tskim_s *) itnim_data);
if (!tskim) {
BFA_LOG(KERN_ERR, bfad, bfa_log_level,
"LUN reset, fail to allocate tskim");
@@ -321,13 +323,8 @@ bfad_im_reset_lun_handler(struct scsi_cmnd *cmnd)
goto out;
}
- /*
- * Set host_scribble to NULL to avoid aborting a task command
- * if happens.
- */
- cmnd->host_scribble = NULL;
- bfad_priv(cmnd)->wq = &wq;
- bfad_priv(cmnd)->status = 0;
+ itnim_data->tmf_wq = &wq;
+ itnim_data->tmf_status = 0;
bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim->fcs_itnim);
/*
* bfa_itnim can be NULL if the port gets disconnected and the bfa
@@ -342,14 +339,15 @@ bfad_im_reset_lun_handler(struct scsi_cmnd *cmnd)
rc = FAILED;
goto out;
}
- int_to_scsilun(cmnd->device->lun, &scsilun);
+ int_to_scsilun(sdev->lun, &scsilun);
bfa_tskim_start(tskim, bfa_itnim, scsilun,
FCP_TM_LUN_RESET, BFAD_LUN_RESET_TMO);
spin_unlock_irqrestore(&bfad->bfad_lock, flags);
- wait_event(wq, test_bit(IO_DONE_BIT, &bfad_priv(cmnd)->status));
+ wait_event(wq, test_bit(IO_DONE_BIT, &itnim_data->tmf_status));
- task_status = bfad_priv(cmnd)->status >> 1;
+ itnim_data->tmf_wq = NULL;
+ task_status = itnim_data->tmf_status >> 1;
if (task_status != BFI_TSKIM_STS_OK) {
BFA_LOG(KERN_ERR, bfad, bfa_log_level,
"LUN reset failure, status: %d\n", task_status);
@@ -368,35 +366,47 @@ bfad_im_reset_target_handler(struct scsi_cmnd *cmnd)
{
struct Scsi_Host *shost = cmnd->device->host;
struct scsi_target *starget = scsi_target(cmnd->device);
+ struct fc_rport *rport = starget_to_rport(starget);
struct bfad_im_port_s *im_port =
(struct bfad_im_port_s *) shost->hostdata[0];
- struct bfad_s *bfad = im_port->bfad;
- struct bfad_itnim_s *itnim;
- unsigned long flags;
- u32 rc, rtn = FAILED;
+ struct bfad_s *bfad = im_port->bfad;
+ struct bfad_itnim_data_s *itnim_data;
+ struct bfad_itnim_s *itnim;
+ unsigned long flags;
+ u32 rc, rtn = FAILED;
DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
enum bfi_tskim_status task_status;
spin_lock_irqsave(&bfad->bfad_lock, flags);
- itnim = bfad_get_itnim(im_port, starget->id);
- if (itnim) {
- bfad_priv(cmnd)->wq = &wq;
- rc = bfad_im_target_reset_send(bfad, cmnd, itnim);
- if (rc == BFA_STATUS_OK) {
- /* wait target reset to complete */
- spin_unlock_irqrestore(&bfad->bfad_lock, flags);
- wait_event(wq, test_bit(IO_DONE_BIT,
- &bfad_priv(cmnd)->status));
- spin_lock_irqsave(&bfad->bfad_lock, flags);
-
- task_status = bfad_priv(cmnd)->status >> 1;
- if (task_status != BFI_TSKIM_STS_OK)
- BFA_LOG(KERN_ERR, bfad, bfa_log_level,
- "target reset failure,"
- " status: %d\n", task_status);
- else
- rtn = SUCCESS;
- }
+ if (!rport->dd_data) {
+ spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+ return rtn;
+ }
+ itnim_data = rport->dd_data;
+ if (itnim_data->tmf_wq) {
+ BFA_LOG(KERN_ERR, bfad, bfa_log_level,
+ "target reset failed, TMF already active");
+ spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+ return rtn;
+ }
+ itnim = itnim_data->itnim;
+ itnim_data->tmf_wq = &wq;
+ itnim_data->tmf_status = 0;
+ rc = bfad_im_target_reset_send(bfad, itnim_data);
+ if (rc == BFA_STATUS_OK) {
+ /* wait target reset to complete */
+ spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+ wait_event(wq, test_bit(IO_DONE_BIT,
+ &itnim_data->tmf_status));
+ spin_lock_irqsave(&bfad->bfad_lock, flags);
+
+ task_status = itnim_data->tmf_status >> 1;
+ if (task_status != BFI_TSKIM_STS_OK)
+ BFA_LOG(KERN_ERR, bfad, bfa_log_level,
+ "target reset failure,"
+ " status: %d\n", task_status);
+ else
+ rtn = SUCCESS;
}
spin_unlock_irqrestore(&bfad->bfad_lock, flags);
diff --git a/drivers/scsi/bfa/bfad_im.h b/drivers/scsi/bfa/bfad_im.h
index 4353feedf76a..48e8c12969c9 100644
--- a/drivers/scsi/bfa/bfad_im.h
+++ b/drivers/scsi/bfa/bfad_im.h
@@ -61,6 +61,8 @@ static inline struct bfad_cmd_priv *bfad_priv(struct scsi_cmnd *cmd)
struct bfad_itnim_data_s {
struct bfad_itnim_s *itnim;
+ wait_queue_head_t *tmf_wq;
+ unsigned long tmf_status;
};
struct bfad_im_port_s {
--
2.35.3
next prev parent reply other threads:[~2023-10-16 9:24 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-16 9:24 [PATCHv6 00/17] scsi: EH rework prep patches, part 2 Hannes Reinecke
2023-10-16 9:24 ` [PATCH 01/17] pmcraid: add missing scsi_device_put() in pmcraid_eh_target_reset_handler() Hannes Reinecke
2023-10-16 13:29 ` Christoph Hellwig
2023-10-16 13:37 ` Hannes Reinecke
2023-10-16 9:24 ` [PATCH 02/17] zfcp: do not wait for rports to become unblocked after host reset Hannes Reinecke
2023-10-16 9:24 ` Hannes Reinecke [this message]
2023-10-16 13:35 ` [PATCH 03/17] bfa: Do not use scsi command to signal TMF status Christoph Hellwig
2023-10-16 9:24 ` [PATCH 04/17] aha152x: look for stuck command when resetting device Hannes Reinecke
2023-10-16 13:35 ` Christoph Hellwig
2023-10-16 9:24 ` [PATCH 05/17] a1000u2w: do not rely on the command for inia100_device_reset() Hannes Reinecke
2023-10-16 13:36 ` Christoph Hellwig
2023-10-16 9:24 ` [PATCH 06/17] fas216: Rework device reset to not rely on SCSI command pointer Hannes Reinecke
2023-10-16 9:24 ` [PATCH 07/17] xen-scsifront: add scsi device as argument to scsifront_do_request() Hannes Reinecke
2023-10-16 9:24 ` [PATCH 08/17] xen-scsifront: rework scsifront_action_handler() Hannes Reinecke
2023-10-16 13:36 ` Christoph Hellwig
2023-10-16 9:24 ` [PATCH 09/17] libiscsi: use cls_session as argument for target and session reset Hannes Reinecke
2023-10-19 20:02 ` Mike Christie
2023-10-20 5:53 ` Hannes Reinecke
2023-10-20 16:55 ` michael.christie
2023-10-16 9:24 ` [PATCH 10/17] scsi_transport_iscsi: use session as argument for iscsi_block_scsi_eh() Hannes Reinecke
2023-10-16 9:24 ` [PATCH 11/17] snic: reserve tag for TMF Hannes Reinecke
2023-10-16 13:37 ` Christoph Hellwig
2023-10-16 9:24 ` [PATCH 12/17] snic: allocate device reset command Hannes Reinecke
2023-10-16 13:38 ` Christoph Hellwig
2023-10-16 14:58 ` Hannes Reinecke
2023-10-16 9:24 ` [PATCH 13/17] snic: Use scsi_host_busy_iter() to traverse commands Hannes Reinecke
2023-10-16 9:24 ` [PATCH 14/17] fnic: allocate device reset command on the fly Hannes Reinecke
2023-10-17 6:37 ` Christoph Hellwig
2023-10-16 9:24 ` [PATCH 15/17] fnic: use fc_block_rport() correctly Hannes Reinecke
2023-10-16 9:24 ` [PATCH 16/17] csiostor: use separate TMF command Hannes Reinecke
2023-10-17 6:37 ` Christoph Hellwig
2023-10-16 9:24 ` [PATCH 17/17] dc395x: Remove 'scmd' parameter from doing_srb_done() Hannes Reinecke
2023-10-17 6:38 ` Christoph Hellwig
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