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| author | Martin K. Petersen <martin.petersen@oracle.com> | 2025-02-03 17:52:32 -0500 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2025-02-03 17:52:32 -0500 |
| commit | 026476271efe817b970ea360981ee77919bcdbad (patch) | |
| tree | e783ed2abbd6d274683c5fc13dc2ac440809d979 /include | |
| parent | 14807b4a4e03b66c26f4c82f495fc8fbe35fb95d (diff) | |
| parent | 2c445d5f832a51dfd8527fcce7323f79d37c0432 (diff) | |
| download | lwn-026476271efe817b970ea360981ee77919bcdbad.tar.gz lwn-026476271efe817b970ea360981ee77919bcdbad.zip | |
Merge patch series "scsi: st: scsi_error: More reset patches"
Kai Mäkisara <Kai.Makisara@kolumbus.fi> says:
The first patch re-applies after device reset some settings changed
by the user (partition, density, block size).
The second and third patch address the case where more than one ULD
access the same device. The Unit Attention (UA) sense data is sent only
to one ULD and the others miss it. The st driver needs to find out
if device reset or media change has happened.
The second patch adds counters for New Media and Power On/Reset (POR)
Unit Attentions to the scsi_device struct. The third one changes st
so that these are used: if the value in the scsi_device struct does
not match the one stored locally, the corresponding UA has happened.
Use of the was_reset flag has been removed.
The fourth patch adds a file to sysfs to tell the user if reads/writes
to a tape are blocked following a device reset.
Link: https://lore.kernel.org/r/20250120194925.44432-1-Kai.Makisara@kolumbus.fi
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/scsi/scsi_device.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h index 7acd0ec82bb0..68dd49947d04 100644 --- a/include/scsi/scsi_device.h +++ b/include/scsi/scsi_device.h @@ -247,6 +247,9 @@ struct scsi_device { unsigned int queue_stopped; /* request queue is quiesced */ bool offline_already; /* Device offline message logged */ + unsigned int ua_new_media_ctr; /* Counter for New Media UNIT ATTENTIONs */ + unsigned int ua_por_ctr; /* Counter for Power On / Reset UAs */ + atomic_t disk_events_disable_depth; /* disable depth for disk events */ DECLARE_BITMAP(supported_events, SDEV_EVT_MAXBITS); /* supported events */ @@ -684,6 +687,12 @@ static inline int scsi_device_busy(struct scsi_device *sdev) return sbitmap_weight(&sdev->budget_map); } +/* Macros to access the UNIT ATTENTION counters */ +#define scsi_get_ua_new_media_ctr(sdev) \ + ((const unsigned int)(sdev->ua_new_media_ctr)) +#define scsi_get_ua_por_ctr(sdev) \ + ((const unsigned int)(sdev->ua_por_ctr)) + #define MODULE_ALIAS_SCSI_DEVICE(type) \ MODULE_ALIAS("scsi:t-" __stringify(type) "*") #define SCSI_DEVICE_MODALIAS_FMT "scsi:t-0x%02x" |