Lines Matching refs:SCSI
4 SCSI EH
7 This document describes SCSI midlayer error handling infrastructure.
9 information regarding SCSI midlayer.
13 [1] How SCSI commands travel through the midlayer and to EH
19 [2] How SCSI EH works
25 [2-2-1] Pre transportt->eh_strategy_handler() SCSI midlayer conditions
26 [2-2-2] Post transportt->eh_strategy_handler() SCSI midlayer conditions
30 1. How SCSI commands travel through the midlayer and to EH
36 Each SCSI command is represented with struct scsi_cmnd (== scmd). A
137 4. Wakes up SCSI EH thread if shost->host_busy == shost->host_failed
147 shost->host_failed. This wakes up SCSI EH thread. So, once woken up,
148 SCSI EH thread can expect that all in-flight commands have failed and
160 We'll talk about how SCSI EH takes actions to abort - make LLDD
164 2. How SCSI EH works
167 LLDD's can implement SCSI EH actions in one of the following two
171 LLDD can implement fine-grained EH callbacks and let SCSI
177 handling. As such, it should do all chores the SCSI midlayer
180 Once recovery is complete, SCSI EH resumes normal operation by
201 If eh_strategy_handler() is not present, SCSI midlayer takes charge
209 severity. Some actions are performed by issuing SCSI commands and
240 timed-out scmds, SCSI EH ensures that LLDD forgets about a scmd
320 SCSI transports/LLDDs automatically acquire sense data on
328 FAILED in such cases thus invoking SCSI EH. When the scmd
409 is used. Also, as we're not issuing SCSI commands and
454 it should perform SCSI EH maintenance chores to maintain integrity of
455 SCSI midlayer. IOW, of the steps described in [2-1-2], all steps
459 2.2.1 Pre transportt->eh_strategy_handler() SCSI midlayer conditions
473 2.2.2 Post transportt->eh_strategy_handler() SCSI midlayer conditions