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scsi: target: Add tmr_notify backend function

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Target core is modified to call an optional backend callback function if a
TMR is received or commands are aborted implicitly after a PR command was
received.  The backend function takes as parameters the se_dev, the type of
the TMR, and the list of aborted commands.  If no commands were aborted, an
empty list is supplied.

Link: https://lore.kernel.org/r/20200726153510.13077-3-bstroesser@ts.fujitsu.com
Reviewed-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Bodo Stroesser <bstroesser@ts.fujitsu.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Bodo Stroesser
2020-07-26 17:35:04 +02:00
committed by Martin K. Petersen
parent f5e2714ad1
commit 2e45a1a9c7
4 changed files with 19 additions and 1 deletions
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2
include/target/target_core_backend.h
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@@ -40,6 +40,8 @@ struct target_backend_ops {
ssize_t (*show_configfs_dev_params)(struct se_device *, char *);
sense_reason_t (*parse_cdb)(struct se_cmd *cmd);
void (*tmr_notify)(struct se_device *se_dev, enum tcm_tmreq_table,
struct list_head *aborted_cmds);
u32 (*get_device_type)(struct se_device *);
sector_t (*get_blocks)(struct se_device *);
sector_t (*get_alignment_offset_lbas)(struct se_device *);

1
include/target/target_core_base.h
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@@ -207,6 +207,7 @@ enum tcm_tmreq_table {
TMR_LUN_RESET = 5,
TMR_TARGET_WARM_RESET = 6,
TMR_TARGET_COLD_RESET = 7,
TMR_LUN_RESET_PRO = 0x80,
TMR_UNKNOWN = 0xff,
};