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scsi: fnic: Use scsi_host_busy_iter() to traverse commands

Browse source 
Use scsi_host_busy_iter() to traverse commands instead of hand-crafted
routines walking the command list.

Link: https://lore.kernel.org/r/20210429122517.39659-3-hare@suse.de
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Hannes Reinecke 2021-04-29 14:25:16 +02:00 committed by Martin K. Petersen
parent 3ba1eeff00
commit 35ffbb60bd
1 changed files with 404 additions and 475 deletions
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879
drivers/scsi/fnic/fnic_scsi.c
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@ -1361,90 +1361,90 @@ int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do)
return wq_work_done;
}
static void fnic_cleanup_io(struct fnic *fnic)
static bool fnic_cleanup_io_iter(struct scsi_cmnd *sc, void *data,
bool reserved)
{
int i;
struct fnic *fnic = data;
struct fnic_io_req *io_req;
unsigned long flags = 0;
struct scsi_cmnd *sc;
spinlock_t *io_lock;
unsigned long start_time = 0;
struct fnic_stats *fnic_stats = &fnic->fnic_stats;
for (i = 0; i < fnic->fnic_max_tag_id; i++) {
io_lock = fnic_io_lock_tag(fnic, i);
spin_lock_irqsave(io_lock, flags);
sc = scsi_host_find_tag(fnic->lport->host, i);
if (!sc) {
spin_unlock_irqrestore(io_lock, flags);
continue;
}
io_req = (struct fnic_io_req *)CMD_SP(sc);
if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
!(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) {
/*
* We will be here only when FW completes reset
* without sending completions for outstanding ios.
*/
CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE;
if (io_req && io_req->dr_done)
complete(io_req->dr_done);
else if (io_req && io_req->abts_done)
complete(io_req->abts_done);
spin_unlock_irqrestore(io_lock, flags);
continue;
} else if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
spin_unlock_irqrestore(io_lock, flags);
continue;
}
if (!io_req) {
spin_unlock_irqrestore(io_lock, flags);
continue;
}
CMD_SP(sc) = NULL;
spin_unlock_irqrestore(io_lock, flags);
io_lock = fnic_io_lock_tag(fnic, sc->request->tag);
spin_lock_irqsave(io_lock, flags);
io_req = (struct fnic_io_req *)CMD_SP(sc);
if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
!(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) {
/*
* If there is a scsi_cmnd associated with this io_req, then
* free the corresponding state
* We will be here only when FW completes reset
* without sending completions for outstanding ios.
*/
start_time = io_req->start_time;
fnic_release_ioreq_buf(fnic, io_req, sc);
mempool_free(io_req, fnic->io_req_pool);
sc->result = DID_TRANSPORT_DISRUPTED << 16;
FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
"%s: tag:0x%x : sc:0x%p duration = %lu DID_TRANSPORT_DISRUPTED\n",
__func__, sc->request->tag, sc,
(jiffies - start_time));
if (atomic64_read(&fnic->io_cmpl_skip))
atomic64_dec(&fnic->io_cmpl_skip);
else
atomic64_inc(&fnic_stats->io_stats.io_completions);
/* Complete the command to SCSI */
if (sc->scsi_done) {
if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED))
shost_printk(KERN_ERR, fnic->lport->host,
"Calling done for IO not issued to fw: tag:0x%x sc:0x%p\n",
sc->request->tag, sc);
FNIC_TRACE(fnic_cleanup_io,
sc->device->host->host_no, i, sc,
jiffies_to_msecs(jiffies - start_time),
0, ((u64)sc->cmnd[0] << 32 |
(u64)sc->cmnd[2] << 24 |
(u64)sc->cmnd[3] << 16 |
(u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
(((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
sc->scsi_done(sc);
}
CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE;
if (io_req && io_req->dr_done)
complete(io_req->dr_done);
else if (io_req && io_req->abts_done)
complete(io_req->abts_done);
spin_unlock_irqrestore(io_lock, flags);
return true;
} else if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
spin_unlock_irqrestore(io_lock, flags);
return true;
}
if (!io_req) {
spin_unlock_irqrestore(io_lock, flags);
goto cleanup_scsi_cmd;
}
CMD_SP(sc) = NULL;
spin_unlock_irqrestore(io_lock, flags);
/*
* If there is a scsi_cmnd associated with this io_req, then
* free the corresponding state
*/
start_time = io_req->start_time;
fnic_release_ioreq_buf(fnic, io_req, sc);
mempool_free(io_req, fnic->io_req_pool);
cleanup_scsi_cmd:
sc->result = DID_TRANSPORT_DISRUPTED << 16;
FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
"fnic_cleanup_io: tag:0x%x : sc:0x%p duration = %lu DID_TRANSPORT_DISRUPTED\n",
sc->request->tag, sc, (jiffies - start_time));
if (atomic64_read(&fnic->io_cmpl_skip))
atomic64_dec(&fnic->io_cmpl_skip);
else
atomic64_inc(&fnic_stats->io_stats.io_completions);
/* Complete the command to SCSI */
if (sc->scsi_done) {
if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED))
shost_printk(KERN_ERR, fnic->lport->host,
"Calling done for IO not issued to fw: tag:0x%x sc:0x%p\n",
sc->request->tag, sc);
FNIC_TRACE(fnic_cleanup_io,
sc->device->host->host_no, sc->request->tag, sc,
jiffies_to_msecs(jiffies - start_time),
0, ((u64)sc->cmnd[0] << 32 |
(u64)sc->cmnd[2] << 24 |
(u64)sc->cmnd[3] << 16 |
(u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
(((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
sc->scsi_done(sc);
}
return true;
}
static void fnic_cleanup_io(struct fnic *fnic)
{
scsi_host_busy_iter(fnic->lport->host,
fnic_cleanup_io_iter, fnic);
}
void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq,
@ -1555,20 +1555,121 @@ static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag,
return 0;
}
static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
struct fnic_rport_abort_io_iter_data {
struct fnic *fnic;
u32 port_id;
int term_cnt;
};
static bool fnic_rport_abort_io_iter(struct scsi_cmnd *sc, void *data,
bool reserved)
{
int tag;
int abt_tag;
int term_cnt = 0;
struct fnic_rport_abort_io_iter_data *iter_data = data;
struct fnic *fnic = iter_data->fnic;
int abt_tag = sc->request->tag;
struct fnic_io_req *io_req;
spinlock_t *io_lock;
unsigned long flags;
struct scsi_cmnd *sc;
struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats;
struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats;
struct scsi_lun fc_lun;
enum fnic_ioreq_state old_ioreq_state;
io_lock = fnic_io_lock_tag(fnic, abt_tag);
spin_lock_irqsave(io_lock, flags);
io_req = (struct fnic_io_req *)CMD_SP(sc);
if (!io_req || io_req->port_id != iter_data->port_id) {
spin_unlock_irqrestore(io_lock, flags);
return true;
}
if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
(!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) {
FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
"fnic_rport_exch_reset dev rst not pending sc 0x%p\n",
sc);
spin_unlock_irqrestore(io_lock, flags);
return true;
}
/*
* Found IO that is still pending with firmware and
* belongs to rport that went away
*/
if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
spin_unlock_irqrestore(io_lock, flags);
return true;
}
if (io_req->abts_done) {
shost_printk(KERN_ERR, fnic->lport->host,
"fnic_rport_exch_reset: io_req->abts_done is set "
"state is %s\n",
fnic_ioreq_state_to_str(CMD_STATE(sc)));
}
if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) {
shost_printk(KERN_ERR, fnic->lport->host,
"rport_exch_reset "
"IO not yet issued %p tag 0x%x flags "
"%x state %d\n",
sc, abt_tag, CMD_FLAGS(sc), CMD_STATE(sc));
}
old_ioreq_state = CMD_STATE(sc);
CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
atomic64_inc(&reset_stats->device_reset_terminates);
abt_tag |= FNIC_TAG_DEV_RST;
}
FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
"fnic_rport_exch_reset dev rst sc 0x%p\n", sc);
BUG_ON(io_req->abts_done);
FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
"fnic_rport_reset_exch: Issuing abts\n");
spin_unlock_irqrestore(io_lock, flags);
/* Now queue the abort command to firmware */
int_to_scsilun(sc->device->lun, &fc_lun);
if (fnic_queue_abort_io_req(fnic, abt_tag,
FCPIO_ITMF_ABT_TASK_TERM,
fc_lun.scsi_lun, io_req)) {
/*
* Revert the cmd state back to old state, if
* it hasn't changed in between. This cmd will get
* aborted later by scsi_eh, or cleaned up during
* lun reset
*/
spin_lock_irqsave(io_lock, flags);
if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
CMD_STATE(sc) = old_ioreq_state;
spin_unlock_irqrestore(io_lock, flags);
} else {
spin_lock_irqsave(io_lock, flags);
if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET)
CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
else
CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED;
spin_unlock_irqrestore(io_lock, flags);
atomic64_inc(&term_stats->terminates);
iter_data->term_cnt++;
}
return true;
}
static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
{
struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats;
struct fnic_rport_abort_io_iter_data iter_data = {
.fnic = fnic,
.port_id = port_id,
.term_cnt = 0,
};
FNIC_SCSI_DBG(KERN_DEBUG,
fnic->lport->host,
"fnic_rport_exch_reset called portid 0x%06x\n",
@ -1577,121 +1678,18 @@ static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
if (fnic->in_remove)
return;
for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
abt_tag = tag;
io_lock = fnic_io_lock_tag(fnic, tag);
spin_lock_irqsave(io_lock, flags);
sc = scsi_host_find_tag(fnic->lport->host, tag);
if (!sc) {
spin_unlock_irqrestore(io_lock, flags);
continue;
}
io_req = (struct fnic_io_req *)CMD_SP(sc);
if (!io_req || io_req->port_id != port_id) {
spin_unlock_irqrestore(io_lock, flags);
continue;
}
if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
(!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) {
FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
"fnic_rport_exch_reset dev rst not pending sc 0x%p\n",
sc);
spin_unlock_irqrestore(io_lock, flags);
continue;
}
/*
* Found IO that is still pending with firmware and
* belongs to rport that went away
*/
if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
spin_unlock_irqrestore(io_lock, flags);
continue;
}
if (io_req->abts_done) {
shost_printk(KERN_ERR, fnic->lport->host,
"fnic_rport_exch_reset: io_req->abts_done is set "
"state is %s\n",
fnic_ioreq_state_to_str(CMD_STATE(sc)));
}
if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) {
shost_printk(KERN_ERR, fnic->lport->host,
"rport_exch_reset "
"IO not yet issued %p tag 0x%x flags "
"%x state %d\n",
sc, tag, CMD_FLAGS(sc), CMD_STATE(sc));
}
old_ioreq_state = CMD_STATE(sc);
CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
atomic64_inc(&reset_stats->device_reset_terminates);
abt_tag = (tag | FNIC_TAG_DEV_RST);
FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
"fnic_rport_exch_reset dev rst sc 0x%p\n",
sc);
}
BUG_ON(io_req->abts_done);
FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
"fnic_rport_reset_exch: Issuing abts\n");
spin_unlock_irqrestore(io_lock, flags);
/* Now queue the abort command to firmware */
int_to_scsilun(sc->device->lun, &fc_lun);
if (fnic_queue_abort_io_req(fnic, abt_tag,
FCPIO_ITMF_ABT_TASK_TERM,
fc_lun.scsi_lun, io_req)) {
/*
* Revert the cmd state back to old state, if
* it hasn't changed in between. This cmd will get
* aborted later by scsi_eh, or cleaned up during
* lun reset
*/
spin_lock_irqsave(io_lock, flags);
if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
CMD_STATE(sc) = old_ioreq_state;
spin_unlock_irqrestore(io_lock, flags);
} else {
spin_lock_irqsave(io_lock, flags);
if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET)
CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
else
CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED;
spin_unlock_irqrestore(io_lock, flags);
atomic64_inc(&term_stats->terminates);
term_cnt++;
}
}
if (term_cnt > atomic64_read(&term_stats->max_terminates))
atomic64_set(&term_stats->max_terminates, term_cnt);
scsi_host_busy_iter(fnic->lport->host, fnic_rport_abort_io_iter,
&iter_data);
if (iter_data.term_cnt > atomic64_read(&term_stats->max_terminates))
atomic64_set(&term_stats->max_terminates, iter_data.term_cnt);
}
void fnic_terminate_rport_io(struct fc_rport *rport)
{
int tag;
int abt_tag;
int term_cnt = 0;
struct fnic_io_req *io_req;
spinlock_t *io_lock;
unsigned long flags;
struct scsi_cmnd *sc;
struct scsi_lun fc_lun;
struct fc_rport_libfc_priv *rdata;
struct fc_lport *lport;
struct fnic *fnic;
struct fc_rport *cmd_rport;
struct reset_stats *reset_stats;
struct terminate_stats *term_stats;
enum fnic_ioreq_state old_ioreq_state;
if (!rport) {
printk(KERN_ERR "fnic_terminate_rport_io: rport is NULL\n");
@ -1719,108 +1717,7 @@ void fnic_terminate_rport_io(struct fc_rport *rport)
if (fnic->in_remove)
return;
reset_stats = &fnic->fnic_stats.reset_stats;
term_stats = &fnic->fnic_stats.term_stats;
for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
abt_tag = tag;
io_lock = fnic_io_lock_tag(fnic, tag);
spin_lock_irqsave(io_lock, flags);
sc = scsi_host_find_tag(fnic->lport->host, tag);
if (!sc) {
spin_unlock_irqrestore(io_lock, flags);
continue;
}
io_req = (struct fnic_io_req *)CMD_SP(sc);
if (!io_req) {
spin_unlock_irqrestore(io_lock, flags);
continue;
}
cmd_rport = starget_to_rport(scsi_target(sc->device));
if (rport != cmd_rport) {
spin_unlock_irqrestore(io_lock, flags);
continue;
}
if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
(!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) {
FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
"fnic_terminate_rport_io dev rst not pending sc 0x%p\n",
sc);
spin_unlock_irqrestore(io_lock, flags);
continue;
}
/*
* Found IO that is still pending with firmware and
* belongs to rport that went away
*/
if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
spin_unlock_irqrestore(io_lock, flags);
continue;
}
if (io_req->abts_done) {
shost_printk(KERN_ERR, fnic->lport->host,
"fnic_terminate_rport_io: io_req->abts_done is set "
"state is %s\n",
fnic_ioreq_state_to_str(CMD_STATE(sc)));
}
if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) {
FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
"fnic_terminate_rport_io "
"IO not yet issued %p tag 0x%x flags "
"%x state %d\n",
sc, tag, CMD_FLAGS(sc), CMD_STATE(sc));
}
old_ioreq_state = CMD_STATE(sc);
CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
atomic64_inc(&reset_stats->device_reset_terminates);
abt_tag = (tag | FNIC_TAG_DEV_RST);
FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
"fnic_terminate_rport_io dev rst sc 0x%p\n", sc);
}
BUG_ON(io_req->abts_done);
FNIC_SCSI_DBG(KERN_DEBUG,
fnic->lport->host,
"fnic_terminate_rport_io: Issuing abts\n");
spin_unlock_irqrestore(io_lock, flags);
/* Now queue the abort command to firmware */
int_to_scsilun(sc->device->lun, &fc_lun);
if (fnic_queue_abort_io_req(fnic, abt_tag,
FCPIO_ITMF_ABT_TASK_TERM,
fc_lun.scsi_lun, io_req)) {
/*
* Revert the cmd state back to old state, if
* it hasn't changed in between. This cmd will get
* aborted later by scsi_eh, or cleaned up during
* lun reset
*/
spin_lock_irqsave(io_lock, flags);
if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
CMD_STATE(sc) = old_ioreq_state;
spin_unlock_irqrestore(io_lock, flags);
} else {
spin_lock_irqsave(io_lock, flags);
if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET)
CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
else
CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED;
spin_unlock_irqrestore(io_lock, flags);
atomic64_inc(&term_stats->terminates);
term_cnt++;
}
}
if (term_cnt > atomic64_read(&term_stats->max_terminates))
atomic64_set(&term_stats->max_terminates, term_cnt);
fnic_rport_exch_reset(fnic, rport->port_id);
}
/*
@ -2115,6 +2012,156 @@ static inline int fnic_queue_dr_io_req(struct fnic *fnic,
return ret;
}
struct fnic_pending_aborts_iter_data {
struct fnic *fnic;
struct scsi_cmnd *lr_sc;
struct scsi_device *lun_dev;
int ret;
};
static bool fnic_pending_aborts_iter(struct scsi_cmnd *sc,
void *data, bool reserved)
{
struct fnic_pending_aborts_iter_data *iter_data = data;
struct fnic *fnic = iter_data->fnic;
struct scsi_device *lun_dev = iter_data->lun_dev;
int abt_tag = sc->request->tag;
struct fnic_io_req *io_req;
spinlock_t *io_lock;
unsigned long flags;
struct scsi_lun fc_lun;
DECLARE_COMPLETION_ONSTACK(tm_done);
enum fnic_ioreq_state old_ioreq_state;
if (sc == iter_data->lr_sc || sc->device != lun_dev)
return true;
if (reserved)
return true;
io_lock = fnic_io_lock_tag(fnic, abt_tag);
spin_lock_irqsave(io_lock, flags);
io_req = (struct fnic_io_req *)CMD_SP(sc);
if (!io_req) {
spin_unlock_irqrestore(io_lock, flags);
return true;
}
/*
* Found IO that is still pending with firmware and
* belongs to the LUN that we are resetting
*/
FNIC_SCSI_DBG(KERN_DEBUG, 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);
return true;
}
if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
(!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) {
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);
return true;
}
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)));
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;
BUG_ON(io_req->abts_done);
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;
spin_unlock_irqrestore(io_lock, flags);
/* Now queue the abort command to firmware */
int_to_scsilun(sc->device->lun, &fc_lun);
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);
iter_data->ret = FAILED;
return false;
} 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);
}
CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED;
wait_for_completion_timeout(&tm_done, msecs_to_jiffies
(fnic->config.ed_tov));
/* Recheck cmd state to check if it is now aborted */
spin_lock_irqsave(io_lock, flags);
io_req = (struct fnic_io_req *)CMD_SP(sc);
if (!io_req) {
spin_unlock_irqrestore(io_lock, flags);
CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL;
return true;
}
io_req->abts_done = NULL;
/* if abort is still pending with fw, fail */
if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) {
spin_unlock_irqrestore(io_lock, flags);
CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE;
iter_data->ret = FAILED;
return false;
}
CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
/* original sc used for lr is handled by dev reset code */
if (sc != iter_data->lr_sc)
CMD_SP(sc) = NULL;
spin_unlock_irqrestore(io_lock, flags);
/* original sc used for lr is handled by dev reset code */
if (sc != iter_data->lr_sc) {
fnic_release_ioreq_buf(fnic, io_req, sc);
mempool_free(io_req, fnic->io_req_pool);
}
/*
* Any IO is returned during reset, it needs to call scsi_done
* to return the scsi_cmnd to upper layer.
*/
if (sc->scsi_done) {
/* Set result to let upper SCSI layer retry */
sc->result = DID_RESET << 16;
sc->scsi_done(sc);
}
return true;
}
/*
* Clean up any pending aborts on the lun
* For each outstanding IO on this lun, whose abort is not completed by fw,
@ -2123,157 +2170,25 @@ static inline int fnic_queue_dr_io_req(struct fnic *fnic,
*/
static int fnic_clean_pending_aborts(struct fnic *fnic,
struct scsi_cmnd *lr_sc,
bool new_sc)
bool new_sc)
{
int tag, abt_tag;
struct fnic_io_req *io_req;
spinlock_t *io_lock;
unsigned long flags;
int ret = 0;
struct scsi_cmnd *sc;
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;
int ret = SUCCESS;
struct fnic_pending_aborts_iter_data iter_data = {
.fnic = fnic,
.lun_dev = lr_sc->device,
.ret = SUCCESS,
};
for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
io_lock = fnic_io_lock_tag(fnic, tag);
spin_lock_irqsave(io_lock, flags);
sc = scsi_host_find_tag(fnic->lport->host, tag);
/*
* ignore this lun reset cmd if issued using new SC
* or cmds that do not belong to this lun
*/
if (!sc || ((sc == lr_sc) && new_sc) || sc->device != lun_dev) {
spin_unlock_irqrestore(io_lock, flags);
continue;
}
if (new_sc)
iter_data.lr_sc = lr_sc;
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_DEBUG, 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);
continue;
}
if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
(!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) {
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;
}
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)));
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;
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;
spin_unlock_irqrestore(io_lock, flags);
/* Now queue the abort command to firmware */
int_to_scsilun(sc->device->lun, &fc_lun);
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);
}
CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED;
wait_for_completion_timeout(&tm_done,
msecs_to_jiffies
(fnic->config.ed_tov));
/* Recheck cmd state to check if it is now aborted */
spin_lock_irqsave(io_lock, flags);
io_req = (struct fnic_io_req *)CMD_SP(sc);
if (!io_req) {
spin_unlock_irqrestore(io_lock, flags);
CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL;
continue;
}
io_req->abts_done = NULL;
/* if abort is still pending with fw, fail */
if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) {
spin_unlock_irqrestore(io_lock, flags);
CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE;
ret = 1;
goto clean_pending_aborts_end;
}
CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
/* original sc used for lr is handled by dev reset code */
if (sc != lr_sc)
CMD_SP(sc) = NULL;
spin_unlock_irqrestore(io_lock, flags);
/* original sc used for lr is handled by dev reset code */
if (sc != lr_sc) {
fnic_release_ioreq_buf(fnic, io_req, sc);
mempool_free(io_req, fnic->io_req_pool);
}
/*
* Any IO is returned during reset, it needs to call scsi_done
* to return the scsi_cmnd to upper layer.
*/
if (sc->scsi_done) {
/* Set result to let upper SCSI layer retry */
sc->result = DID_RESET << 16;
sc->scsi_done(sc);
}
scsi_host_busy_iter(fnic->lport->host,
fnic_pending_aborts_iter, &iter_data);
if (iter_data.ret == FAILED) {
ret = iter_data.ret;
goto clean_pending_aborts_end;
}
schedule_timeout(msecs_to_jiffies(2 * fnic->config.ed_tov));
/* walk again to check, if IOs are still pending in fw */
@ -2772,6 +2687,49 @@ void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did)
}
static bool fnic_abts_pending_iter(struct scsi_cmnd *sc, void *data,
bool reserved)
{
struct fnic_pending_aborts_iter_data *iter_data = data;
struct fnic *fnic = iter_data->fnic;
int cmd_state;
struct fnic_io_req *io_req;
spinlock_t *io_lock;
unsigned long flags;
/*
* ignore this lun reset cmd or cmds that do not belong to
* this lun
*/
if (iter_data->lr_sc && sc == iter_data->lr_sc)
return true;
if (iter_data->lun_dev && sc->device != iter_data->lun_dev)
return true;
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) {
spin_unlock_irqrestore(io_lock, flags);
return true;
}
/*
* 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)));
cmd_state = CMD_STATE(sc);
spin_unlock_irqrestore(io_lock, flags);
if (cmd_state == FNIC_IOREQ_ABTS_PENDING)
iter_data->ret = 1;
return iter_data->ret ? false : true;
}
/*
* 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,
@ -2781,49 +2739,20 @@ void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did)
*/
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;
struct fnic_pending_aborts_iter_data iter_data = {
.fnic = fnic,
.lun_dev = NULL,
.ret = 0,
};
if (lr_sc)
lun_dev = lr_sc->device;
/* walk again to check, if IOs are still pending in fw */
for (tag = 0; tag < fnic->fnic_max_tag_id; 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)
ret = 1;
spin_unlock_irqrestore(io_lock, flags);
if (lr_sc) {
iter_data.lun_dev = lr_sc->device;
iter_data.lr_sc = lr_sc;
}
return ret;
/* walk again to check, if IOs are still pending in fw */
scsi_host_busy_iter(fnic->lport->host,
fnic_abts_pending_iter, &iter_data);
return iter_data.ret;
}